code: def is_list(node):
      """Does the node represent a list literal?"""
      return (
          isinstance(node, Node)
          and len(node.children) > 1
          and isinstance(node.children[0], Leaf)
          and isinstance(node.children[-1], Leaf)
          and node.children[0].value == "["
          and node.children[-1].value == "]"
      )
  
imports: from itertools import islice
  from .pgen2 import token
  from .pytree import Leaf, Node
  from .pygram import python_symbols
  from .None import patcomp
label_desc: Use image node_id 19 for calling a global function with example usage: is_list(node) and returns: unknown