code: function(e, data) {
  		mfp.ev.triggerHandler(NS + e, data);
  
  		if(mfp.st.callbacks) {
  			// converts "mfpEventName" to "eventName" callback and triggers it if it's present
  			e = e.charAt(0).toLowerCase() + e.slice(1);
  			if(mfp.st.callbacks[e]) {
  				mfp.st.callbacks[e].apply(mfp, $.isArray(data) ? data : [data]);
  			}
  		}
  	}
docs: Private functions