code: public PolicyDefinitionInner createOrUpdate(String policyDefinitionName, PolicyDefinitionInner parameters) {
          return createOrUpdateWithServiceResponseAsync(policyDefinitionName, parameters).toBlocking().single().body();
      }
docs: Creates or updates a policy definition.
  
  @param policyDefinitionName The name of the policy definition to create.
  @param parameters The policy definition properties.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @throws CloudException thrown if the request is rejected by server
  @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent
  @return the PolicyDefinitionInner object if successful.