code: def concat_block(
      tensor, n_filters, n_layers=2, activation=layers.ReLU(), seed=None
  ):
      shortcut = tensor
      tensor = dense_block(
          tensor, n_filters, n_layers, activation, seed
      )
      return layers.concatenate([shortcut, tensor], -1)
  
label_desc: Use image node_id 2 for calling a global function with example usage: concat_block(tensor, n_filters, n_layers, activation, seed) and returns: layers