extends function not set with jason reader

[hbagheri]

Thank you for your grate Library

i've added draw2d.Connection.extend to show a right click menu for connections
It works properly while create a new connection but not works if the connection was loaded from a saved JSON.
would you please help me to solve my problem

[freegroup]

if your read/write JSON from your drawd2d diagram, it is important that all elements has the attribute NAME.
This attribute is use late to create JS object instances.
https://github.com/freegroup/draw2d/blob/master/examples/connection_with_contextmenu/MyConnection.js#L12

If this attribute exists, the constructor of your Connection class is correct called and the coding for the cotext menue is executed.

https://freegroup.github.io/draw2d/#/examples/connection_with_contextmenu