code: def test__copytobuffer__numpy_masked_array():
      in_arr = numpy.ma.array([1])
      out_arr, dtype = _copytobuffer(in_arr)
  
      assert isinstance(out_arr, numpy.ma.MaskedArray)
  
file_path: pyproj/test/test_utils.py
imports: from array import array
  import numpy
  import pytest
  from pyproj.utils import DataType, _copytobuffer, _copytobuffer_return_scalar
label_desc: Use image node_id 6 for calling a global function with example usage: test__copytobuffer__numpy_masked_array() without return types