public com.google.protobuf.ByteString getDisplayNameBytes() {
        java.lang.Object ref = displayName_;
        if (ref instanceof String) {
          com.google.protobuf.ByteString b =
              com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
          displayName_ = b;
          return b;
        } else {
          return (com.google.protobuf.ByteString) ref;
        }
      }
<pre>
Optional. display_name is an optional field for users to identify CIDR
blocks.
</pre>

<code>string display_name = 1 [(.google.api.field_behavior) = OPTIONAL];</code>

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