Following URL shows you how to execute a runnable class. https://<D365URL> /?cmp=<YourCompanyName>&mi=SysClassRunner&cls=<YourRunnableClassName>
Category: D365
Details master form – override creatRecord
When creating a details master form and your creating a record in the normal grid not all mandatory fields are visible. To switch to the details form view you can override the function createRecord.