@Nullable
    private static EqualsCheck create(@Nullable PsiExpression maybeEqualsCheckExpression) {
      final Negated n = Negated.create(maybeEqualsCheckExpression);
      if (n != null && n.expression instanceof PsiMethodCallExpression callExpression) {
        if (HardcodedMethodConstants.EQUALS.equals(callExpression.getMethodExpression().getReferenceName())) {
          final PsiExpression argument = getArgumentExpression(callExpression);
          final PsiExpression qualifier = getQualifierExpression(callExpression);
          if (argument != null && qualifier != null) {
            return new EqualsCheck(argument, qualifier, n.isEqual);
          }
        }
      }
      return null;
    }
@Nullable
    private static EqualsCheck create(@Nullable PsiExpression maybeEqualsCheckExpression)