c-lineup-ObjC-method-call-colons is a compiled Lisp function in `cc-align.el'.

(c-lineup-ObjC-method-call-colons LANGELEM)

Line up selector args as Project Builder / XCode: colons of first
selector portions on successive lines are aligned. If no decision can
be made return NIL, so that other lineup methods can be tried. This is
typically chained with `c-lineup-ObjC-method-call'.

Works with: objc-method-call-cont.