[PATCH 14/37] perf evsel: Convert to _is_group_leader method

From: Namhyung Kim Convert perf_evsel__is_group_member to perf_evsel__is_group_leader. This is because the most usecases are using negative form to check whether the given evsel is a leader or not and it's IMHO somewhat ambiguous - leader also *is* a member of the group. Signed-off-by: Namhyung

[PATCH 14/37] perf evsel: Convert to _is_group_leader method

From: Namhyung Kim namhyung@lge.com Convert perf_evsel__is_group_member to perf_evsel__is_group_leader. This is because the most usecases are using negative form to check whether the given evsel is a leader or not and it's IMHO somewhat ambiguous - leader also *is* a member of the group.