code: public ServiceFuture<PolicyDefinitionInner> getAsync(String policyDefinitionName, final ServiceCallback<PolicyDefinitionInner> serviceCallback) {
          return ServiceFuture.fromResponse(getWithServiceResponseAsync(policyDefinitionName), serviceCallback);
      }
docs: Gets the policy definition.
  
  @param policyDefinitionName The name of the policy definition to get.
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object