code: public ServiceFuture<ServiceEndpointPolicyDefinitionInner> getAsync(String resourceGroupName, String serviceEndpointPolicyName, String serviceEndpointPolicyDefinitionName, final ServiceCallback<ServiceEndpointPolicyDefinitionInner> serviceCallback) {
          return ServiceFuture.fromResponse(getWithServiceResponseAsync(resourceGroupName, serviceEndpointPolicyName, serviceEndpointPolicyDefinitionName), serviceCallback);
      }
docs: Get the specified service endpoint policy definitions from service endpoint policy.
  
  @param resourceGroupName The name of the resource group.
  @param serviceEndpointPolicyName The name of the service endpoint policy name.
  @param serviceEndpointPolicyDefinitionName The name of the service endpoint policy definition name.
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object