How to use array fields?

I see from #2111271: Add handling for fields with arrays (was: Creating Addressfields), and from reading the code, that we try to handle fields with "sub field" arrays intelligently. IE when expandEntityFields encounters a field where $value is an array with named keys, we try to set the field accordingly.

What I don't understand is how that translates into Gherkin, in writing the actual test. So how would I go about using an addressfield or similar with tabular data? I'm looking for something like this:

Given I am viewing a Profile:
| name | ohthehugemanatee |
|address | array("street" => "123 Main st.", "state" => "VA", "zip" => "12345") |

Any help is appreciated.