src/vs/workbench/contrib/customEditor/common/contributedCustomEditors.ts/ContributedCustomEditors/add
class ContributedCustomEditors:	private add(info: CustomEditorInfo): void {
		if (this._editors.has(info.id)) {
			console.error(`Custom editor with id '${info.id}' already registered`);
			return;
		}
		this._editors.set(info.id, info);
	}