private com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.workstations.v1beta.WorkstationConfig.Host.GceInstance
                    .GceShieldedInstanceConfig,
                com.google.cloud.workstations.v1beta.WorkstationConfig.Host.GceInstance
                    .GceShieldedInstanceConfig.Builder,
                com.google.cloud.workstations.v1beta.WorkstationConfig.Host.GceInstance
                    .GceShieldedInstanceConfigOrBuilder>
            getShieldedInstanceConfigFieldBuilder() {
          if (shieldedInstanceConfigBuilder_ == null) {
            shieldedInstanceConfigBuilder_ =
                new com.google.protobuf.SingleFieldBuilderV3<
                    com.google.cloud.workstations.v1beta.WorkstationConfig.Host.GceInstance
                        .GceShieldedInstanceConfig,
                    com.google.cloud.workstations.v1beta.WorkstationConfig.Host.GceInstance
                        .GceShieldedInstanceConfig.Builder,
                    com.google.cloud.workstations.v1beta.WorkstationConfig.Host.GceInstance
                        .GceShieldedInstanceConfigOrBuilder>(
                    getShieldedInstanceConfig(), getParentForChildren(), isClean());
            shieldedInstanceConfig_ = null;
          }
          return shieldedInstanceConfigBuilder_;
        }
<pre>
Optional. A set of Compute Engine Shielded instance options.
</pre>

<code>
.google.cloud.workstations.v1beta.WorkstationConfig.Host.GceInstance.GceShieldedInstanceConfig shielded_instance_config = 8 [(.google.api.field_behavior) = OPTIONAL];
</code>
java-workstations/proto-google-cloud-workstations-v1beta/src/main/java/com/google/cloud/workstations/v1beta/WorkstationConfig.java