Should the method that calls Object>>#ffiCall: and variants always return the result of this call? For instance, in uFFI book, there is a method abs: defined as

FFITutorial class >> abs: n [
�� �� ^ self ffiCall: #( int abs (int n) )
]

on page 16, however

FFITutorial >> abs: n [
�� �� self ffiCall: #( int abs (int n) )
]

on page 52 doesn't have an explicit return ^. The book, however, in most of the examples uses the explicit return.��What is the recommended approach?��