public AugAssignStatement(BinaryOperator binaryOperator, Expression leftSide, Expression rightSide)
 {
     this.op = binaryOperator; this.lhs = leftSide; this.rhs = rightSide;
 }
 public BinaryExpression(BinaryOperator op, Expression left, Expression right)
 {
     this.op = op; this.left = left; this.right = right;
     this.Start = left.Start; this.End = right.End;
 }