private void checkMatrixMultiplicationOperator(PsiElement node) {
    registerForAllMatchingVersions(level -> level.isOlderThan(LanguageLevel.PYTHON35) && registerForLanguageLevel(level),
                                   PyPsiBundle.message("INSP.compatibility.feature.support.matrix.multiplication.operators"),
                                   node);
  }
private void checkMatrixMultiplicationOperator(PsiElement node)