private static boolean isOneOfVariablesDefinitelyNullAsPartOfBooleanExpression(PsiBinaryExpression expression, Filter filter) {
    final PsiBinaryExpression binOp = tryCast(skipParenthesizedExprUp(expression.getParent()), PsiBinaryExpression.class);
    if (binOp == null) return false;
    return filter.isOneOfVariablesDefinitelyNull(binOp, binOp.getLOperand()) ||
           filter.isOneOfVariablesDefinitelyNull(binOp, binOp.getROperand());
  }
private static boolean isOneOfVariablesDefinitelyNullAsPartOfBooleanExpression(PsiBinaryExpression expression, Filter filter)