public Builder setTags(int index, java.lang.String value) {
          if (value == null) {
            throw new NullPointerException();
          }
          ensureTagsIsMutable();
          tags_.set(index, value);
          bitField0_ |= 0x00000008;
          onChanged();
          return this;
        }
<pre>
Optional. Network tags to add to the Compute Engine VMs backing the
workstations. This option applies
[network
tags](https://cloud.google.com/vpc/docs/add-remove-network-tags) to VMs
created with this configuration. These network tags enable the creation
of [firewall
rules](https://cloud.google.com/workstations/docs/configure-firewall-rules).
</pre>

<code>repeated string tags = 4 [(.google.api.field_behavior) = OPTIONAL];</code>

@param index The index to set the value at.
@param value The tags to set.
@return This builder for chaining.
java-workstations/proto-google-cloud-workstations-v1beta/src/main/java/com/google/cloud/workstations/v1beta/WorkstationConfig.java