[dev] Group-Member Permission Method

Hi All, I am working with number of otrs api, now i want to find all permission related group-member using api, but not able to find it with proper way. I have used these methods: "Method=GroupMemberList" "Method=GroupGroupMemberList" "Method=GroupMemberInvolvedList" "Method=GroupMemberAdd" But not getting proper permission values. any ideas please help me. Thanks& Regards, Anup