Add nest generic type  support, such as ’NSDictionary<NSNumber *, NSArray<NSString *> *>’.
Add nest generic type  support, such as ’NSDictionary<NSNumber *, NSArray<NSString *> *>’.

antlr/grammars-v4,antlr/grammars-v4,antlr/grammars-v4,antlr/grammars-v4,antlr/grammars-v4,antlr/grammars-v4,antlr/grammars-v4,antlr/grammars-v4,antlr/grammars-v4,antlr/grammars-v4,antlr/grammars-v4,antlr/grammars-v4