code: def __call__(
      self, root: "ir.BaseIR", binding_sites: Dict[int, BindingSite]
  ):
      root_builder = []
      bindings_stack: Dict[int, CSEPrintPass.BindingsStackFrame] = {}
      memo = self.renderer.memo
  
      if id(root) in memo:
          return "".join(memo[id(root)])
      root_ctx = ({var: 0 for var in root.free_vars}, {}, {})
      stack = [
          self.StackFrame.make(
              root,
              self.renderer,
              binding_sites,
              bindings_stack,
              0,
              0,
              False,
              root_ctx,
              0,
          )
      ]
      stack[0].set_builder(root_builder, self.renderer)
  
      while True:
          frame = stack[-1]
          node = frame.node
          frame.child_idx += 1
          child_idx = frame.child_idx
  
          if child_idx >= len(frame.children):
              if frame.lift_to_frame is not None:
                  assert not frame.insert_lets
                  if id(node) in memo:
                      frame.builder.append(memo[id(node)])
                  else:
                      frame.builder.append(
                          node.render_tail(self.renderer)
                      )
                  frame.builder.append(" ")
                  # let_bodies is built post-order, which guarantees earlier
                  # lets can't refer to later lets
                  frame.lift_to_frame.let_bodies.append(frame.builder)
                  stack.pop()
                  continue
              else:
                  frame.builder.append(node.render_tail(self.renderer))
                  stack.pop()
                  if frame.insert_lets:
                      if not stack:
                          out_builder = root_builder
                      else:
                          out_builder = stack[-1].builder
                      frame.add_lets(
                          bindings_stack[frame.depth].let_bodies,
                          out_builder,
                      )
                      del bindings_stack[frame.depth]
                  if not stack:
                      return "".join(root_builder)
                  continue
  
          if child_idx > 0:
              frame.builder.append(" ")
          child = frame.children[child_idx]
  
          child_frame = frame.make_child_frame(
              self.renderer, binding_sites, bindings_stack
          )
  
          lift_to_frame = None
          if isinstance(child, ir.BaseIR):
              bind_depth = child_frame.bind_depth()
              if bind_depth in bindings_stack:
                  c = bindings_stack[bind_depth]
                  if (
                      c.depth >= child_frame.min_value_binding_depth
                      and id(child) in c.lifted_lets
                  ):
                      lift_to_frame = c
                      lift_type = "value"
                  elif (
                      child_frame.min_binding_depth
                      <= c.depth
                      < child_frame.min_value_binding_depth
                  ):
                      if (
                          child_frame.scan_scope
                          and id(child) in c.scan_lifted_lets
                      ):
                          lift_to_frame = c
                          lift_type = "scan"
                      elif (
                          not child_frame.scan_scope
                          and id(child) in c.agg_lifted_lets
                      ):
                          lift_to_frame = c
                          lift_type = "agg"
  
          if lift_to_frame:
              if lift_type == "value":
                  visited = lift_to_frame.visited
                  name = lift_to_frame.lifted_lets[id(child)]
              elif lift_type == "agg":
                  visited = lift_to_frame.agg_visited
                  name = lift_to_frame.agg_lifted_lets[id(child)]
              else:
                  visited = lift_to_frame.scan_visited
                  name = lift_to_frame.scan_lifted_lets[id(child)]
  
              frame.builder.append(f"(Ref {name})")
  
              if id(child) in visited:
                  continue
  
              if lift_type == "value":
                  child_builder = [f"(Let {name} "]
              elif lift_type == "agg":
                  child_builder = [f"(AggLet {name} False "]
              else:
                  child_builder = [f"(AggLet {name} True "]
  
              if id(child) in memo:
                  child_builder.append(memo[id(child)])
                  child_builder.append(" ")
                  lift_to_frame.let_bodies.append(child_builder)
                  continue
  
              visited[id(child)] = child
  
              child_frame.set_builder(child_builder, self.renderer)
              child_frame.lift_to_frame = lift_to_frame
              stack.append(child_frame)
              continue
  
          if id(child) in memo:
              frame.builder.append(memo[id(child)])
              continue
  
          child_frame = frame.make_child_frame(
              self.renderer, binding_sites, bindings_stack
          )
          child_frame.set_builder(frame.builder, self.renderer)
          stack.append(child_frame)
          continue
  
imports: from hail import ir
  import abc
  from typing import Sequence, MutableSequence, List, Set, Dict, Optional
  from collections import namedtuple
label_desc: Use image node_id 2 for calling the CSEPrintPass obj's underlying member method code with example usage: obj.__call__(root, binding_sites) and returns: str, str