public java.lang.String getSecondaryLocation() {
      java.lang.Object ref = secondaryLocation_;
      if (!(ref instanceof java.lang.String)) {
        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        secondaryLocation_ = s;
        return s;
      } else {
        return (java.lang.String) ref;
      }
    }
<pre>
Required. Additional zone for a higher level of availability and load
balancing. Specify the resource name of a zone that belongs to the region
of the private cloud. For example:
`projects/{project}/locations/europe-west3-b` where `{project}` can either
be a project number or a project ID.
</pre>

<code>
string secondary_location = 2 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
</code>

@return The secondaryLocation.
java-vmwareengine/proto-google-cloud-vmwareengine-v1/src/main/java/com/google/cloud/vmwareengine/v1/StretchedClusterConfig.java