code: def iter_neighbors_color(self, color):
      adj_color_node = self.adj_color[color]
      while adj_color_node is not None:
          yield adj_color_node.node_id
          adj_color_node = adj_color_node.col_next
  
imports: import itertools
  from collections import defaultdict, deque
  import networkx
  from networkx.utils import arbitrary_element, py_random_state
label_desc: Use image node_id 6 for calling the _Node obj's underlying member method code with example usage: obj.iter_neighbors_color(color) without return types