public Builder clearDisplayName() {
        displayName_ = getDefaultInstance().getDisplayName();
        bitField0_ = (bitField0_ & ~0x00000001);
        onChanged();
        return this;
      }
<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 This builder for chaining.
java-telcoautomation/proto-google-cloud-telcoautomation-v1/src/main/java/com/google/cloud/telcoautomation/v1/MasterAuthorizedNetworksConfig.java