public Builder setSubnetwork(java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      subnetwork_ = value;
      bitField0_ |= 0x00000800;
      onChanged();
      return this;
    }
<pre>
Immutable. Name of the Compute Engine subnetwork in which instances
associated with this workstation cluster will be created. Must be part of
the subnetwork specified for this workstation cluster.
</pre>

<code>string subnetwork = 11 [(.google.api.field_behavior) = IMMUTABLE];</code>

@param value The subnetwork to set.
@return This builder for chaining.
java-workstations/proto-google-cloud-workstations-v1beta/src/main/java/com/google/cloud/workstations/v1beta/WorkstationCluster.java