string display(T)(T[] groupIndex = [],bool getStr = false, int termianlw = 0)
Description: Display groupBy on terminal
@params: groupIndex - Group index in form of integer array or string array
@params: getStr - Returns the generated display sring
@params: termianlw - Set terminal width
stringdisplay(T[] groupIndex, bool getStr, int termianlw)
string display(T)(T[] groupIndex = [],bool getStr = false, int termianlw = 0) Description: Display groupBy on terminal @params: groupIndex - Group index in form of integer array or string array @params: getStr - Returns the generated display sring @params: termianlw - Set terminal width