@java.lang.Override
    public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(displayName_)) {
        com.google.protobuf.GeneratedMessageV3.writeString(output, 1, displayName_);
      }
      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(cidrBlock_)) {
        com.google.protobuf.GeneratedMessageV3.writeString(output, 2, cidrBlock_);
      }
      getUnknownFields().writeTo(output);
    }
<pre>
Optional. cidr_block must be specified in CIDR notation when using
master_authorized_networks_config. Currently, the user could still use
the deprecated man_block field, so this field is currently optional, but
will be required in the future.
</pre>

<code>string cidr_block = 2 [(.google.api.field_behavior) = OPTIONAL];</code>

@return The bytes for cidrBlock.
java-telcoautomation/proto-google-cloud-telcoautomation-v1alpha1/src/main/java/com/google/cloud/telcoautomation/v1alpha1/MasterAuthorizedNetworksConfig.java