Documentation for method
signature assembled from the following types:
Instance method returning the signature of the object. Returns a
Blob type object if the signature could not be established.
method signature( ForeignCode: )
Returns the signature of the enclosed code.
multi method signature(Code: --> Signature)
Signature object for this code object, which describes its parameters.
sub a(Int , Str ) ;say .signature; # OUTPUT: «(Int $one, Str $two)␤»