calls/1
calls(Protocol) calls(Protocol1, Protocol2, ...) calls([Protocol1, Protocol2, ...]) Declares the protocol(s) that are called by predicates defined in an object or category.
calls(Protocol) calls(Protocol1, Protocol2, ...) calls([Protocol1, Protocol2, ...])
Declares the protocol(s) that are called by predicates defined in an object or category.
calls(+protocol_identifiers)
:- calls(comparingp).