code: def _copy_kernel(dtype):
      return cuda_kernel_factory(copy_kernel, (dtype,), "copy_kernel")
  
file_path: cuml/python/cuml/prims/stats/covariance.py
imports: from cuml.common.kernel_utils import cuda_kernel_factory
  import cuml.internals
  import math
  from cuml.internals.safe_imports import gpu_only_import
label_desc: Use image node_id 4 for calling a global function with example usage: _copy_kernel(dtype) and returns: cuda_kernel_factory