API C ChatInfo.IsChannelRegional

Needs summary.
 isRegional = C_ChatInfo.IsChannelRegional(channelIndex)
 = C_ChatInfo.IsChannelRegionalForChannelID(channelID)
==Arguments==
===IsChannelRegional===
:;channelIndex:
===IsChannelRegionalForChannelID===
:;channelID:
==Returns==
:;isRegional:
==Patch changes==