private static bool OperandsAre(BinaryOperatorExpression binOp, AphidExpressionType type) => binOp.LeftOperand.Type == type && binOp.RightOperand.Type == type;
public List <AphidExpression> Find( List <AphidExpression> source, AphidExpressionType expressionType, bool ignoreMatchChildren = false) => Find(source, x => x.Type == expressionType);