code: private void fireMemberAdded(MemberId newMember) {
          GL.debug(GL.CLUSTER_LOGGER_NAME, "Firing member added for : {}", newMember);
          for (MembershipEventListener listener : membershipEventListeners) {
              try {
                  listener.memberAdded(newMember);
              } catch (Throwable e) {
                  GL.error(GL.CLUSTER_LOGGER_NAME, "Error in member added event {}", e);
              }
          }
      }
docs: Fire member added event