public Builder mergeReservationAffinity(
        com.google.cloud.vertexai.api.ReservationAffinity value) {
      if (reservationAffinityBuilder_ == null) {
        if (((bitField0_ & 0x00000010) != 0)
            && reservationAffinity_ != null
            && reservationAffinity_
                != com.google.cloud.vertexai.api.ReservationAffinity.getDefaultInstance()) {
          getReservationAffinityBuilder().mergeFrom(value);
        } else {
          reservationAffinity_ = value;
        }
      } else {
        reservationAffinityBuilder_.mergeFrom(value);
      }
      if (reservationAffinity_ != null) {
        bitField0_ |= 0x00000010;
        onChanged();
      }
      return this;
    }
<pre>
Optional. Immutable. Configuration controlling how this resource pool
consumes reservation.
</pre>

<code>
.google.cloud.vertexai.v1.ReservationAffinity reservation_affinity = 5 [(.google.api.field_behavior) = IMMUTABLE, (.google.api.field_behavior) = OPTIONAL];
</code>
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/MachineSpec.java