static CallHandler<CallChainSimplification> handler() {
      return CallHandler.of(STREAM_SUPPORT, call -> {
        PsiExpression[] args = call.getArgumentList().getExpressions();
        PsiExpression parallel = args[1];
        if (!ExpressionUtils.isLiteral(parallel, Boolean.TRUE) && !ExpressionUtils.isLiteral(parallel, Boolean.FALSE)) return null;
        PsiMethodCallExpression spliterator = tryCast(skipParenthesizedExprDown(args[0]), PsiMethodCallExpression.class);
        if (!SPLITERATOR.test(spliterator)) return null;
        PsiExpression qualifier = skipParenthesizedExprDown(spliterator.getMethodExpression().getQualifierExpression());
        if (qualifier == null || (qualifier instanceof PsiThisExpression)) return null;
        return new ReplaceStreamSupportWithCollectionStreamFix(qualifier, ExpressionUtils.isLiteral(parallel, Boolean.TRUE));
      });
    }
static CallHandler<CallChainSimplification> handler()