public java.lang.String getServicesCidrBlock() {
      java.lang.Object ref = servicesCidrBlock_;
      if (!(ref instanceof java.lang.String)) {
        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        servicesCidrBlock_ = s;
        return s;
      } else {
        return (java.lang.String) ref;
      }
    }
<pre>
Optional. The IP address range for the cluster service IPs. Set to blank to
have a range chosen with the default size. Set to /netmask (e.g. /14) to
have a range chosen with a specific netmask. Set to a CIDR notation (e.g.
10.96.0.0/14) from the RFC-1918 private networks (e.g. 10.0.0.0/8,
172.16.0.0/12, 192.168.0.0/16) to pick a specific range to use.
</pre>

<code>string services_cidr_block = 5 [(.google.api.field_behavior) = OPTIONAL];</code>

@return The servicesCidrBlock.
java-telcoautomation/proto-google-cloud-telcoautomation-v1/src/main/java/com/google/cloud/telcoautomation/v1/FullManagementConfig.java