src/vs/workbench/contrib/customEditor/browser/customEditors.ts/CustomEditorService/getAllCustomEditors
class CustomEditorService:	public getAllCustomEditors(resource: URI): CustomEditorInfoCollection {
		return new CustomEditorInfoCollection([
			...this.getUserConfiguredCustomEditors(resource).allEditors,
			...this.getContributedCustomEditors(resource).allEditors,
		]);
	}