Algo-Web / POData

            }

            foreach ($keyProperties as $keyName => $keyResourceProperty) {

                if (!array_key_exists($keyName, $this->_namedValues)) {

                    $keysAsString = null;

                    foreach (array_keys($keyProperties) as $key) {

                        $keysAsString .= $key . ', ';

                    }

                    $keysAsString = rtrim($keysAsString, ' ,');

                    throw ODataException::createSyntaxError(

                        Messages::keyDescriptorMissingKeys(

                            $segmentAsString,

                            $keysAsString

                        )

                    );

                }

                $typeProvided = $this->_namedValues[$keyName][1];

                $expectedType = $keyResourceProperty->getInstanceType();

            }

        }

        if (!$isSupportedVersion) {

            $availableVersions = null;

            foreach (self::getKnownDataServiceVersions() as $version1) {

                $availableVersions .= $version1->toString() . ', ';

            }

            $availableVersions = rtrim($availableVersions, ', ');

            throw ODataException::createBadRequestError(

                Messages::requestDescriptionUnSupportedVersion(

                    $headerName,

                    $versionHeader,

                    $availableVersions

                )

            );

        }

        return $version;

    }