symfony/symfony-docs — comment on commit 78fbe0505f42b091eca4dd42b780291e3eed950d
File: cookbook/form/create_custom_field_type.rst line 60
By weaverryan:

I want them to see how the internals of this class look - how `buildForm`, `buildView`, and `getDefaultOptions` all work together. You just can't get that from the API.