classes(for:argumentIndex:ofReply:)

Returns the current list of allowed classes that can appear within the specified collection object argument to the specified method.

Declaration

func classes(for sel: Selector, argumentIndex arg: Int, ofReply: Bool) -> Set<AnyHashable>

sel:
Specifies which method in the protocol you want information about.
arg:
Specifies the position (starting at index 0) of the parameter for which you want to obtain the current set of allowed classes. This may be either the position of a parameter in the method itself or the position in its reply block.
ofReply:
Pass True if arg is an index into the parameters of the reply block, or False if it is an index into the parameters of the method itself.