Method contains

api/src/main/java/io/grpc/InternalChannelz.java:253–256

(
      Map<Long, T> map, InternalLogId id)

  }

  private static <T extends InternalInstrumented<?>> boolean contains(
      Map<Long, T> map, InternalLogId id) {
    return map.containsKey(id.getId());
  }

  public static final class RootChannelList {
    public final List<InternalInstrumented<ChannelStats>> channels;