code: def block_graph1():
      g = dgl.heterograph(
          {
              ("user", "plays", "game"): ([0, 1, 2], [1, 1, 0]),
              ("user", "likes", "game"): ([1, 2, 3], [0, 0, 2]),
              ("store", "sells", "game"): ([0, 1, 1], [0, 1, 2]),
          },
          device=F.cpu(),
      )
      return dgl.to_block(g)
  
imports: from collections import defaultdict
  import backend
  import dgl
  import networkx
  import numpy
  import scipy.sparse
label_desc: Use image node_id 14 for calling a global function with example usage: block_graph1() and returns: dgl