Access http response metadata?

[nahuel-soldevilla]

(Logging some features discussed during the hackaton, which are not currently available at least to my knowledge)

Use case: read totalCount and use it for some pagination control. This is how we usually do it using angular httpclient:

 this.http.get(this.context.source + '/germplasm', {
      params: {
        studyDbId: this.context.studySelected.studyDbId,
        page: (this.page - 1).toString(),
        pageSize: this.pageSize.toString(),
      }
    }).subscribe((res: any) => {
      this.germplasm = res.result.data;
      this.totalCount = res.metadata.pagination.totalCount;
    });