Thank you for this library. :+1: Are there any reasons why custom attributes are not supported like described in [4.1 Adding XML Attributes to GraphML Elements](http://graphml.graphdrawing.org/primer/graphml-primer.html#AttributesExt)? Only [complex types](http://graphml.graphdrawing.org/primer/graphml-primer.html#Complex) are supported, but custom XML attributes would be useful too.
Thank you for this library. 👍
Are there any reasons why custom attributes are not supported like described in 4.1 Adding XML Attributes to GraphML Elements?
Only complex types are supported, but custom XML attributes would be useful too.