diff --git a/core/lib/Drupal/Core/Entity/Sql/DefaultTableMapping.php b/core/lib/Drupal/Core/Entity/Sql/DefaultTableMapping.php
index b701279..46c1130 100644
--- a/core/lib/Drupal/Core/Entity/Sql/DefaultTableMapping.php
+++ b/core/lib/Drupal/Core/Entity/Sql/DefaultTableMapping.php
@@ -217,14 +217,7 @@ public function getFieldColumnName(FieldStorageDefinitionInterface $storage_defi
   }
 
   /**
-   * Adds field columns for a table to the table mapping.
-   *
-   * @param string $table_name
-   *   The name of the table to add the field column for.
-   * @param string[] $field_names
-   *   A list of field names to add the columns for.
-   *
-   * @return $this
+   * {@inheritdoc}
    */
   public function setFieldNames($table_name, array $field_names) {
     $this->fieldNames[$table_name] = $field_names;
@@ -244,14 +237,7 @@ public function getExtraColumns($table_name) {
   }
 
   /**
-   * Adds a extra columns for a table to the table mapping.
-   *
-   * @param string $table_name
-   *   The name of table to add the extra columns for.
-   * @param string[] $column_names
-   *   The list of column names.
-   *
-   * @return $this
+   * {@inheritdoc}
    */
   public function setExtraColumns($table_name, array $column_names) {
     $this->extraColumns[$table_name] = $column_names;
@@ -261,36 +247,21 @@ public function setExtraColumns($table_name, array $column_names) {
   }
 
   /**
-   * Checks whether the given field can be stored in a shared table.
-   *
-   * @param \Drupal\Core\Field\FieldStorageDefinitionInterface $storage_definition
-   *   The field storage definition.
-   *
-   * @return bool
-   *   TRUE if the field can be stored in a dedicated table, FALSE otherwise.
+   * {@inheritdoc}
    */
   public function allowsSharedTableStorage(FieldStorageDefinitionInterface $storage_definition) {
     return !$storage_definition->hasCustomStorage() && $storage_definition->isBaseField() && !$storage_definition->isMultiple();
   }
 
   /**
-   * Checks whether the given field has to be stored in a dedicated table.
-   *
-   * @param \Drupal\Core\Field\FieldStorageDefinitionInterface $storage_definition
-   *   The field storage definition.
-   *
-   * @return bool
-   *   TRUE if the field can be stored in a dedicated table, FALSE otherwise.
+   * {@inheritdoc}
    */
   public function requiresDedicatedTableStorage(FieldStorageDefinitionInterface $storage_definition) {
     return !$storage_definition->hasCustomStorage() && !$this->allowsSharedTableStorage($storage_definition);
   }
 
   /**
-   * Gets a list of dedicated table names for this mapping.
-   *
-   * @return string[]
-   *   An array of table names.
+   * {@inheritdoc}
    */
   public function getDedicatedTableNames() {
     $table_mapping = $this;
@@ -309,16 +280,7 @@ public function getReservedColumns() {
   }
 
   /**
-   * Generates a table name for a field data table.
-   *
-   * @param \Drupal\Core\Field\FieldStorageDefinitionInterface $storage_definition
-   *   The field storage definition.
-   * @param bool $is_deleted
-   *   (optional) Whether the table name holding the values of a deleted field
-   *   should be returned.
-   *
-   * @return string
-   *   A string containing the generated name for the database table.
+   * {@inheritdoc}
    */
   public function getDedicatedDataTableName(FieldStorageDefinitionInterface $storage_definition, $is_deleted = FALSE) {
     if ($is_deleted) {
@@ -335,16 +297,7 @@ public function getDedicatedDataTableName(FieldStorageDefinitionInterface $stora
   }
 
   /**
-   * Generates a table name for a field revision archive table.
-   *
-   * @param \Drupal\Core\Field\FieldStorageDefinitionInterface $storage_definition
-   *   The field storage definition.
-   * @param bool $is_deleted
-   *   (optional) Whether the table name holding the values of a deleted field
-   *   should be returned.
-   *
-   * @return string
-   *   A string containing the generated name for the database table.
+   * {@inheritdoc}
    */
   public function getDedicatedRevisionTableName(FieldStorageDefinitionInterface $storage_definition, $is_deleted = FALSE) {
     if ($is_deleted) {
diff --git a/core/lib/Drupal/Core/Entity/Sql/TableMappingInterface.php b/core/lib/Drupal/Core/Entity/Sql/TableMappingInterface.php
index 9d555a1..7a372fe 100644
--- a/core/lib/Drupal/Core/Entity/Sql/TableMappingInterface.php
+++ b/core/lib/Drupal/Core/Entity/Sql/TableMappingInterface.php
@@ -115,5 +115,86 @@ public function getFieldColumnName(FieldStorageDefinitionInterface $storage_defi
    * @throws \Drupal\Core\Entity\Sql\SqlContentEntityStorageException
    */
   public function getFieldTableName($field_name);
-
+    
+  /**
+   * Adds field columns for a table to the table mapping.
+   *
+   * @param string $table_name
+   *   The name of the table to add the field column for.
+   * @param string[] $field_names
+   *   A list of field names to add the columns for.
+   *
+   * @return $this
+   */
+  public function setFieldNames($table_name, array $field_names);
+    
+  /**
+   * Adds a extra columns for a table to the table mapping.
+   *
+   * @param string $table_name
+   *   The name of table to add the extra columns for.
+   * @param string[] $column_names
+   *   The list of column names.
+   *
+   * @return $this
+   */
+  public function setExtraColumns($table_name, array $column_names);
+  	
+  /**
+   * Checks whether the given field can be stored in a shared table.
+   *
+   * @param \Drupal\Core\Field\FieldStorageDefinitionInterface $storage_definition
+   *   The field storage definition.
+   *
+   * @return bool
+   *   TRUE if the field can be stored in a dedicated table, FALSE otherwise.
+   */
+  public function allowsSharedTableStorage(FieldStorageDefinitionInterface $storage_definition);
+     
+  /**
+   * Checks whether the given field has to be stored in a dedicated table.
+   *
+   * @param \Drupal\Core\Field\FieldStorageDefinitionInterface $storage_definition
+   *   The field storage definition.
+   *
+   * @return bool
+   *   TRUE if the field can be stored in a dedicated table, FALSE otherwise.
+   */
+  public function requiresDedicatedTableStorage(FieldStorageDefinitionInterface $storage_definition);
+  
+  /**
+   * Gets a list of dedicated table names for this mapping.
+   *
+   * @return string[]
+   *   An array of table names.
+   */
+  public function getDedicatedTableNames();
+  
+  /**
+   * Generates a table name for a field data table.
+   *
+   * @param \Drupal\Core\Field\FieldStorageDefinitionInterface $storage_definition
+   *   The field storage definition.
+   * @param bool $is_deleted
+   *   (optional) Whether the table name holding the values of a deleted field
+   *   should be returned.
+   *
+   * @return string
+   *   A string containing the generated name for the database table.
+   */
+  public function getDedicatedDataTableName(FieldStorageDefinitionInterface $storage_definition, $is_deleted = FALSE);
+  
+  /**
+   * Generates a table name for a field revision archive table.
+   *
+   * @param \Drupal\Core\Field\FieldStorageDefinitionInterface $storage_definition
+   *   The field storage definition.
+   * @param bool $is_deleted
+   *   (optional) Whether the table name holding the values of a deleted field
+   *   should be returned.
+   *
+   * @return string
+   *   A string containing the generated name for the database table.
+   */
+  public function getDedicatedRevisionTableName(FieldStorageDefinitionInterface $storage_definition, $is_deleted = FALSE);
 }