== Problem ==
Creating new classes/widgets with OOJS UI feels very cumbersome (see T155567). E.g. method declaration is split into different statements all across the source file.
== Who would benefit ==
Any developer that wants to work with OOJS (UI)
== Proposed solution ==
Create a high level function that allows more declarative creation of a class. E.g.:
```
OO.defineClass({
className: 'MyExtension.ui.dialog.Edit' //"namespace" get's created automatically
extends: 'OO.ui.Dialog',
titleMsg: 'myext-dialog-edit-title',
initialize: function () {
MyExtension.ui.dialog.Edit.super.prototype.initialize.call( this );
this.content = new OO.ui.PanelLayout( { padded: true, expanded: false } );
this.content.$element.append( '<p>A simple dialog window. Press \'Esc\' to close. </p>' );
this.$body.append( this.content.$element );
}
});
```