code: public static boolean isBinaryExpressionType(Expression expression, List<String> tokens) {
          if (expression instanceof BinaryExpression) {
              if (tokens.contains(((BinaryExpression) expression).getOperation().getText())) {
                  return true;
              }
          }
          return false;
      }
docs: Returns true if the expression is a binary expression with the specified token.
  @param expression - the expression node
  @param tokens - the List of allowable (operator) tokens
  @return as described