code: protected B maxReservedStreams(int maxReservedStreams) {
          enforceConstraint("server", "connection", connection);
          enforceConstraint("server", "codec", decoder);
          enforceConstraint("server", "codec", encoder);
  
          this.maxReservedStreams = checkPositiveOrZero(maxReservedStreams, "maxReservedStreams");
          return self();
      }
docs: Set the maximum number of streams which can be in the reserved state at any given time.