A machine-wireable source edge for a sourced field: pull select (default "id") from operation op's response.
sourced
select
op
the source operation's v4 by-name handle (C009 identity: op.name).
op.name
Optional
a dotted path into the source op's RESPONSE to pull (default "id").
A machine-wireable source edge for a
sourcedfield: pullselect(default "id") from operationop's response.