private void removePossibleSimpleKey(){
  SimpleKey key=possibleSimpleKeys.remove(flowLevel);
  if (key != null && key.isRequired()) {
    throw new ScannerException("while scanning a simple key",key.getMark(),"could not find expected ':'",reader.getMark());
  }
}

private void removePossibleSimpleKey ( ) { SimpleKey key = possibleSimpleKeys . remove ( flowLevel ) ; if ( key != null && key . isRequired ( ) ) { throw new ScannerException ( "while scanning a simple key" , key . getMark ( ) , "could not find expected ':'" , reader . getMark ( ) ) ; } }
remove the saved possible key position at the current flow level .
