code: def _get_fieldmask(self):
      mdescr = [(n, "|b1") for n in self.dtype.names]
      fdmask = np.empty(self.shape, dtype=mdescr)
      fdmask.flat = tuple([False] * len(mdescr))
      return fdmask
  
imports: from numpy.ma import MAError, MaskedArray, masked, nomask, masked_array, getdata, getmaskarray, filled
  import numpy.ma
  import warnings
  import numpy
  from numpy import dtype, ndarray, array
  from numpy._core.records import recarray, fromarrays, fromrecords
label_desc: Use image node_id 2 for calling a global function with example usage: _get_fieldmask() and returns: fdmask