doBegin method

Expression doBegin(
  1. ExpressionType op
)

Begin a nested expression @param op Operator to combine with the current expression @return Expression

Implementation

Expression doBegin(ExpressionType op) {
  final newTree = ExpressionNode.fromTypeParent(op, mCurrent);
  mCurrent!.nodes.add(newTree);
  mCurrent = newTree;
  return this;
}