* New ``ExtendedType`` features:
* Added support for mixin-classes and delayed creation of slots.
* Added automatic initializers for annotated fields (previously causing an exception due to slots).
* Added automatic initializers for annotated class fields (previously causing an exception due to slots).
* Added new decorators: ``slotted``, ``mixin``, ``singleton``, ``readonly``, and ``notimplemented``.
* Added JSON support for ``pyTooling.Configuration``.
* New ``Platform`` features:
* Added ``PythonVersion`` to ``Platform`` to distinguish Python versions.
* Added ``PythonImplementation`` to ``Platform`` to distinguish CPython and PyPy.
* New graph features:
* ``GetVertexByID``
* ``GetVertexByValue``
* New vertex operations: ``IterateAllOutboundPathsAsVertexList``, ``Delete`` (itself), ``DeleteEdgeTo``, ``DeleteEdgeFrom``, ``DeleteLinkTo``, ``DeleteLinkFrom``.
* New edge operations: ``Delete`` (itself)
* New link operations: ``Delete`` (itself)
* ``pyToolong.StateMachine`` package (alpha version).
Mar. 2023 - Version 4
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