code: def xmoe_dense_64k():
      """Very wide layer- run on 4x4."""
      hparams = xmoe_dense_4k()
      hparams.d_ff = 65536
      hparams.mesh_shape = "model:4,batch:8"
      return hparams
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from tensor2tensor.models import mtf_transformer
  from tensor2tensor.models import mtf_transformer2
  from tensor2tensor.models.research import moe
  from tensor2tensor.utils import registry
label_desc: Use image node_id 7 for calling a global function with example usage: xmoe_dense_64k() and returns: hparams