1. $.isFunction(o.starting) && ! callback && o.starting(el, li.eq(current));

The line above can also be found on the git repo of the plugin :

now i figured out the above line , is nothing but a sequence of if conditions , something like below : 

so , 1st  $.isFunction(o.starting) is checked , if true , only then , ! callback && is checked 

and if !checked is true then only o.starting(el, li.eq(current)); is checked .

now i am having a problem with the last part of that statement : I.E.

o.starting(el, li.eq(current));

it seems to be a function that executing , i checked the entire Unslider.js code and found no 

function called starting(param , param2); 

the only reference to anything close to starting is on line 165(the line i am having difficulty 

with)  of the plugin and line 26 .

can somebody tell me what exactly is o.starting(el, li.eq(current)); doing in the plugin ?? is it a function executing ??

Thanks

Gautam.