You're seeing just the function
forage_multiple_select, go back to ForageWeb.ForageView module for more information.
Link to this function
forage_multiple_select(form, field, opts)
%Phoenix.HTml.Form.t/1)- the form
:path(required) - the URL from which to request the data This function won't be applied to values requested from the server after
:foreign_key(optional) - The name of the foreign key (as a string or an atom). If this is not supplied it will default to