docstr: Check whether x lies in the support of the distribution.
docstr_tok: ["Check","whether","x","lies","in","the","support","of","the","distribution","."]
code: def _support_mask(self, x):
      """
      Check whether x lies in the support of the distribution.
      """
      return ~np.any(_dot_diag(x, self._i_zero), axis=-1)
  
imports: from functools import cached_property
  import numpy
  from scipy import linalg
  from scipy.stats import _multivariate
label_desc: Use image node_id 4 for calling the CovViaDiagonal obj's underlying member method code with example usage: obj._support_mask(x) and returns: unknown