Add support for custom metadata object

[whitenrock]

When calling sap.ui.base.Object.extend, it is possible to specify a custom metadata object as a third parameter:

https://ui5.sap.com/#/api/sap.ui.base.Object%23methods/sap.ui.base.Object.extend

It should be possible to set this also in the typescript definiton. (maybe another jsdoc parameter -> @metadata?)

Thanks!

[GuillaumedesPommareSAP]

Hello,

This has nothing to do with this project, which is focusing on transforming standard Javascript/Typescript code into code compatible with UI5.

Please fill an issue in the project from SAP: https://github.com/SAP/ui5-typescript/issues