NextEndpoint
static BMidiEndpoint *NextEndpoint(int32 *id);
while (BMidiEndpoint* endpoint = BMidiRoster::NextEndpoint(&id)) {
while ((endp = BMidiRoster::NextEndpoint(&id)) != NULL) {
while ((endp = NextEndpoint(id)) != NULL) {
endp = looper->NextEndpoint(id);
while ((endp = NextEndpoint(id)) != NULL) {
BMidiEndpoint* NextEndpoint(int32* id);