[type]
CompositeParser

[grammar]
grammar M;
import S;
s : a ;
B : 'b' ; // defines B from inherited token space
WS : (' '|'\n') -> skip ;

[slaveGrammar]
parser grammar S;
a : B {<writeln("\"S.a\"")>};

[start]
s

[input]
b

[output]
"""S.a
"""