Default implementation of the IMdmRestHandler interface, using the fetch API to
complete HTTP requests.
By using the fetch API, all process() return values will become promises
to handle the asynchronous responses and finally return the json body content of each response.
Default implementation of the IMdmRestHandler interface, using the
fetchAPI to complete HTTP requests.By using the
fetchAPI, allprocess()return values will become promises to handle the asynchronous responses and finally return thejsonbody content of each response.