function convertLiteral(sPropertyName, sValue) {
			var oPropertyMetadata = oEntityType[sPropertyName];

			if (oPropertyMetadata.$Type !== "Edm.String") {
				sValue = that.formatPropertyAsLiteral(
					_Helper.parseLiteral(sValue, oPropertyMetadata.$Type, sPath),
					oPropertyMetadata);
			}
			return encodeURIComponent(sValue);
		}
Converts an OData V4 key predicate for the given type to OData V2.

@param {string} sV4KeyPredicate
  The OData V4 key predicate
@param {string} sPath
  The binding path of the entity described by the key predicate
@returns {string}
  The corresponding OData V2 key predicate

@private