public java.lang.String getDisplayName() {
        java.lang.Object ref = displayName_;
        if (!(ref instanceof java.lang.String)) {
          com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
          java.lang.String s = bs.toStringUtf8();
          displayName_ = s;
          return s;
        } else {
          return (java.lang.String) 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 displayName.
java-telcoautomation/proto-google-cloud-telcoautomation-v1/src/main/java/com/google/cloud/telcoautomation/v1/MasterAuthorizedNetworksConfig.java