$l_Columns->insert('end', {
            'Col A'  => "Sample Text A",
            'Col B'  => "This is a \n sample \n text ",
            'Col C'  =>"Sample Text \n  C",
            'Col D'  =>"Sample Text \n  D",
            'Col E'  =>"Sample Text \n  E",                                
                            }
                        );