src/vs/workbench/services/progress/browser/progressIndicator.ts/AbstractProgressScope/onScopeOpened
class AbstractProgressScope:	protected onScopeOpened(scopeId: string) {
		if (scopeId === this.scopeId) {
			if (!this._isActive) {
				this._isActive = true;

				this._onDidChangeActive.fire();
			}
		}
	}