code: def _init_ndmin(self, ndmin):
      ivy.utils.assertions.check_isinstance(ndmin, int)
      if ndmin > len(ivy.shape(self._data)):
          self._data = ivy.expand_dims(self._data, axis=0)
          self._mask = ivy.expand_dims(self._mask, axis=0)
  
imports: import ivy
  import ivy.functional.frontends.numpy
  import numpy
label_desc: Use image node_id 5 for calling the MaskedArray obj's underlying member method code with example usage: obj._init_ndmin(ndmin) without return types