function stripKeyPredicate(sSegment) {
			var iPos = sSegment.indexOf("(");
			return iPos >= 0
				? sSegment.slice(0, iPos)
				: sSegment;
		}
Returns the OData meta model context corresponding to the given OData model path.

@param {string} [sPath]
  an absolute path pointing to an entity or property, e.g.
  "/ProductSet(1)/ToSupplier/BusinessPartnerID"; this equals the
  <a href="http://www.odata.org/documentation/odata-version-2-0/uri-conventions#ResourcePath">
  resource path</a> component of a URI according to OData V2 URI conventions
@returns {sap.ui.model.Context|null}
  the context for the corresponding metadata object, i.e. an entity type or its property,
  or <code>null</code> in case no path is given
@throws {Error} in case no context can be determined
@public