Could you demonstrate that with a CodeSandbox please: https://codesandbox.io/s/unruffled-sun-ch6oz?file=/src/index.js
You still need to inject your custom module into bpmn-js as an additional module: How to add additional modules to the Modeler?
Could you demonstrate that with a CodeSandbox please: https://codesandbox.io/s/unruffled-sun-ch6oz?file=/src/index.js
You still need to inject your custom module into bpmn-js as an additional module: How to add additional modules to the Modeler?