Second+ level "metadata" inheritance issues

There are conflicts with extending the class which extends standard UI5 class. Example: MyControl extends Control, contains test property OneMoreControl extends MyControl, contains anotherTest property

OneMoreControl gets error: Class static side 'typeof OneMoreControl' incorrectly extends base class static side 'typeof MyControl'.\n The types of 'metadata.properties' are incompatible between these types.\n Property 'test' is missing in type '{ anotherTest: string; }' but required in type '{ test: { type: string; }; }'.

There are two ways of dealing with it:

1. Adding properties to OneMoreControl from MyControl, but I guess it would fail at runtime, because, if I recall correctly, metadata field is removed at runtime by UI5 framework.
2. Adding @ts-expect-error

Both options seems to be bad. Any suggestions? Thanks!

[akudev]

Ok, with https://github.com/SAP/openui5/commit/8f935aa5d277291bbb985db5aebb76546637873e the type definitions for the “metadata” objects have landed. They can already be seen at and around https://openui5nightly.hana.ondemand.com/api/sap.ui.core.Element.MetadataOptions. They will be released with version 1.110 of the type definitions and once this happened (~mid January) I will adapt the TS control dev examples/tutorials to use them - and close this issue.

[akudev]

FYI: we have enriched the JSDoc processing to enable specifying inheritance in @typedef. So we are going to express the above types directly in the UI5 source code and have them generated to d.ts (and displayed as types on their own in the documentation).