apply()    // apply statement
$apply()   // comment
$apply ""  // apply statement (not a comment) 
$$apply "" // comment

ApplyStmtA: name='apply' '('  ')';

ApplyStmtB: name=ApplyPRE ApplyPOST;

terminal ApplyPRE: '$apply';
terminal ApplyPOST: '"' '"'

terminal SL_COMMENT : ('// ' | '$')  !('\n'|'\r')* ('\r'? '\n')?;