Assists Studio in presenting a schema field picker to the user, for
that have set
The name of the
property being configured,
, is provided as a parameter,
in case the returned Schemas depends on the particular property being configured.
Studio will call this when the user selects the UI affordance for "select fields from schemas"
associated with a
property of type
Studio will set the results from the user's selection (if any) directly into the UI widget reflecting
the property value being edited, then call the property setter. See this class doc for details
on the representation for selected fields.
The receiver may not assume much about the state of typecheck; in particular, input schemas are not
and instead Studio will provide the
current input schemas known to the UI editor via this call.