private static List<ConditionNode> createOperator(final CommonTree ast) throws RecognitionException {
  final List<ConditionNode> children=new ArrayList<>();
  for (  final Object child : ast.getChildren()) {
    children.add(convert((CommonTree)child));
  }
  return children;
}

private static List < ConditionNode > createOperator ( final CommonTree ast ) throws RecognitionException { final List < ConditionNode > children = new ArrayList < > ( ) ; for ( final Object child : ast . getChildren ( ) ) { children . add ( convert ( ( CommonTree ) child ) ) ; } return children ; }
converts the children of an n - ary operator node .
