code: def matmul_default(
      cfg,
      tensor_a,
      tensor_b,
      bias=None,
      out_dtype=None,
      transpose_a=False,
      transpose_b=False,
  ):
      """Matmul operator on GPU"""
      return nn.matmul(
          tensor_a, tensor_b, bias, out_dtype, transpose_a, transpose_b
      )
  
file_path: tvm/python/tvm/topi/gpu/dense.py
imports: import logging
  from tvm import autotvm, te
  from tvm.autotvm.task.space import SplitEntity
  from ..None import nn
  from ..utils import traverse_inline, get_const_tuple
label_desc: Use image node_id 3 for calling a global function with example usage: matmul_default(cfg, tensor_a, tensor_b, bias, out_dtype, transpose_a, transpose_b) and returns: nn