function fetchPropertyAndType() {
			if (bIsAdvertisement) {
				// Ensure entity type metadata is loaded even for advertisement so that sync access
				// to key properties is possible
				return oMetaModel.fetchObject(sBaseMetaPath + "/");
			}

			return _Helper.fetchPropertyAndType(that.oModel.oInterface.fetchMetadata,
				getStrippedMetaPath(sResolvedChildPath));
		}
Determines whether a child binding with the given context and path can use
the cache of this binding or one of its ancestor bindings. If this is the case, enhances
the aggregated query options of this binding with the query options computed from the child
binding's path; the aggregated query options initially hold the binding's local query
options with the entity type's key properties added to $select.

The decision is based on the reduced path of the child binding. If the resolved binding path
contains a pair of navigation properties that are marked as partners, the path is reduced by
removing these two navigation properties from the path.

@param {sap.ui.model.odata.v4.Context} oContext
  A context of this binding which is the direct or indirect parent of the child binding.
  Initially it is the child binding's parent context (See
  {@link sap.ui.model.odata.v4.ODataBinding#fetchOrGetQueryOptionsForOwnCache}). When a
  binding delegates up to its parent binding, it passes its own parent context adjusting
  <code>sChildPath</code> accordingly.
@param {string} sChildPath
  The child binding's binding path relative to <code>oContext</code>
@param {object|sap.ui.base.SyncPromise} [vChildQueryOptions={}]
  The child binding's (aggregated) query options (if any) or a promise resolving with them
@param {boolean} [bIsProperty]
  Whether the child is a property binding
@returns {sap.ui.base.SyncPromise}
  A promise resolved with the reduced path for the child binding if the child binding can use
  this binding's or an ancestor binding's cache; resolved with <code>undefined</code>
  otherwise.

@private
@see sap.ui.model.odata.v4.ODataMetaModel#getReducedPath