Documentation for method yada

Documentation for method yada, assembled from the following types:

class Routine

From Routine

(Routine) method yada

method yada(Routine:D: --> Bool:D)

Returns True if the routine is a stub

say (sub f() { ... }).yada;      # OUTPUT: «True␤» 
say (sub g() { 1;  }).yada;      # OUTPUT: «False␤»