code: def move_witnesses(src_color, dst_color, N, H, F, C, T_cal, L):
      """Move witness along a path from src_color to dst_color."""
      X = src_color
      while X != dst_color:
          Y = T_cal[X]
          # Move _any_ witness from X to Y = T_cal[X]
          w = next(x for x in C[X] if N[(x, Y)] == 0)
          change_color(w, X, Y, N=N, H=H, F=F, C=C, L=L)
          X = Y
  
file_path: networkx/networkx/algorithms/coloring/equitable_coloring.py
imports: from collections import defaultdict
  import networkx
label_desc: Use image node_id 7 for calling a global function with example usage: move_witnesses(src_color, dst_color, N, H, F, C, T_cal, L) without return types