Returns a hash value for coordinate, using seed to seed the calculation.
This function was introduced in Qt 5.7.
© 2020 The Qt Company Ltd.
Documentation contributions included herein are the copyrights of
their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property
of their respective owners.