public Builder mergeUsage(com.google.cloud.tpu.v2alpha1.Reservation.Standard.Usage value) {
        if (usageBuilder_ == null) {
          if (((bitField0_ & 0x00000010) != 0)
              && usage_ != null
              && usage_
                  != com.google.cloud.tpu.v2alpha1.Reservation.Standard.Usage
                      .getDefaultInstance()) {
            getUsageBuilder().mergeFrom(value);
          } else {
            usage_ = value;
          }
        } else {
          usageBuilder_.mergeFrom(value);
        }
        if (usage_ != null) {
          bitField0_ |= 0x00000010;
          onChanged();
        }
        return this;
      }
<pre>
The current usage of the reservation.
</pre>

<code>.google.cloud.tpu.v2alpha1.Reservation.Standard.Usage usage = 5;</code>
java-tpu/proto-google-cloud-tpu-v2alpha1/src/main/java/com/google/cloud/tpu/v2alpha1/Reservation.java