public com.google.cloud.telcoautomation.v1alpha1.MasterAuthorizedNetworksConfig.CidrBlock
            .Builder
        addCidrBlocksBuilder(int index) {
      return getCidrBlocksFieldBuilder()
          .addBuilder(
              index,
              com.google.cloud.telcoautomation.v1alpha1.MasterAuthorizedNetworksConfig.CidrBlock
                  .getDefaultInstance());
    }
<pre>
Optional. cidr_blocks define up to 50 external networks that could access
Kubernetes master through HTTPS.
</pre>

<code>
repeated .google.cloud.telcoautomation.v1alpha1.MasterAuthorizedNetworksConfig.CidrBlock cidr_blocks = 1 [(.google.api.field_behavior) = OPTIONAL];
</code>
java-telcoautomation/proto-google-cloud-telcoautomation-v1alpha1/src/main/java/com/google/cloud/telcoautomation/v1alpha1/MasterAuthorizedNetworksConfig.java