function addSelects(vSelects, sExpandPath) {
			if (!Array.isArray(vSelects)) {
				vSelects = vSelects.split(",");
			}
			vSelects.forEach(function (sSelect) {
				var iIndex = sSelect.indexOf("/");

				if (iIndex >= 0 && !sSelect.includes(".")) {
					// only strip if there is no type cast and no bound action (avoid "correcting"
					// unsupported selects in V2)
					sSelect = sSelect.slice(0, iIndex);
				}
				mSelects[_Helper.buildPath(sExpandPath, sSelect)] = true;
			});
		}
Converts the supported V4 OData system query options to the corresponding V2 OData system
query options.

@param {string} sMetaPath
  The meta path corresponding to the resource path
@param {object} mQueryOptions The query options
@param {function (string,any)} fnResultHandler
  The function to process the converted options getting the name and the value
@param {boolean} [bDropSystemQueryOptions]
  Whether all system query options are dropped (useful for non-GET requests)
@param {boolean} [bSortExpandSelect]
  Whether the paths in $expand and $select shall be sorted in the query string
@throws {Error}
  If a system query option other than $expand and $select is used or if any $expand value is
  not an object

@public