PHP7 - Uniform Variable Syntax

https://wiki.php.net/rfc/uniform_variable_syntax#backward_incompatible_c...

Running this grep -rn -e "->\$[a-zA-Z0-9_]*\[" ./ gives me this

fasttoggle/fasttoggle.module:116:      return $object->$options['fields'][$group]['instances'][$instance]['value_key'];
fasttoggle/fasttoggle.module:159:    $callback = "fasttoggle/{$option_info['object_type']}/{$object->$option_info['id_field']}/{$group}/{$instance}{$view}";
fasttoggle/fasttoggle.module:175:            'id' => $object->$option_info['id_field'],
fasttoggle/fasttoggle.module:186:  $token = $group . '_' . $instance . '_' . $object->$option_info['id_field'];
fasttoggle/fasttoggle.module:187:  $selector_class = 'fasttoggle-status-' . $option_info['object_type'] . '-' . $object->$option_info['id_field'] . '-' . $group . '-' . $instance;
fasttoggle/fasttoggle.module:392:          $setting_key = isset($setting_prefix) ? "{$setting_prefix}_{$type}_{$obj->$filtering['subtype_field']}" : "fasttoggle_{$type}_{$group_name}_settings";
fasttoggle/fasttoggle.module:585:      return drupal_get_form('fasttoggle_do_option_confirm', $object_type, $object->$options['title_field'], $options['fields'][$group]['instances'][$option]['labels'][$label_style][intval(!$object->$option)]);