if (targetFront.isTopLevel) {
      const front = await targetFront.getFront("memory");
      await front.attach();
      this.initializer.updateFront(front);
    }
  }

  // DevToolPanel API

  destroy() {
    // Make sure this panel is not already destroyed.
    if (this._destroyed) {
      return;
    }
    this._destroyed = true;

    this._commands.targetCommand.unwatchTargets({
      types: [this._commands.targetCommand.TYPES.FRAME],
      onAvailable: this._onTargetAvailable,
    });

    this.initializer.destroy();

    this.panelWin.gHeapAnalysesClient.destroy();
    this.panelWin = null;
    this.emit("destroyed");
  }
}

exports.MemoryPanel = MemoryPanel;
PK