Hi All

Having recently found the choice loader quite useful, I felt the need to offer to contribute to it's documentation. Better to see if the team agrees before I do anything though.

I would like to propose something along these lines:

• Break down of how implementations of the choice loader component work, as well as how and when it's methods are called in the request/response cycle

• An example or two. Perhaps a drop down list with many options that is dynamically loaded via Ajax. (see [Form] Support "allow_add"/"allow_delete" in ChoiceType symfony#9310 (comment))

I see #5179 was closed with choice_loader documentation incomplete, and having searched other issues I haven't found anything else in progress. Would this be agreeable to go ahead with?