API C MapBar.GetParticipationPercentage

__NOTOC__
Returns the player faction's contribution to unlocking the next phase of the current map.
 participation = C_MapBar.GetParticipationPercentage()
==Returns==
; participation : Number - player faction's contribution, in percent, towards unlocking the next phase of the current map; nil if the current map does not use the map bar.
==Details==
* The return value may exceed 100.
==Patch changes==
*