EdgeId Class
============

.. php:class:: EdgeId

    Represents an Edge Id within a Link

    .. php:method:: __construct(?string $id = null, array $properties = [])

        Creates an Edge Id

        :param string $id: The edge id (default: auto-generate)
        :param array $properties: CSS properties as property=>value pairs
        :returns: A new instance of ``EdgeId``
        :rtype: EdgeId