====== Workflow ======
==== 3, Write Commonest Logic for visible interactivity ====
  - Load a ui holder(panel)
    - <code c#>UIHub.instance.LoadUI((int)UIPanelType.TestPanel);</code>
  - Close a ui holder
    - <code c#>
UIHub.instance.GetBinder<$uibinder$> ((int)arr [0]/*holder insid*/).OnBtnClose ();
</code>
  - Call a check dialog
    - <code c#>
UIHub.instance.LoadCheckDialogUI (
    "Warning",
    "Are you sure to delete this profile?",
    new Dictionary<UIEnum_CheckDlgBtnType, string> () { 
        { UIEnum_CheckDlgBtnType.Confirm, "Confirm" }, 
        { UIEnum_CheckDlgBtnType.Cancel, "Cancel" } },
    btnType => {
	if (btnType == UIEnum_CheckDlgBtnType.Confirm) {
            //TODO:
	}
    }
);
</code>

Run and try to operate the components.
  * Take open a check dialog for example
  * {{:1_guide:1_guide_2_makeholder_7.png?675}}
  * {{:1_guide:1_guide_2_makeholder_8.png?675}}
  * {{:1_guide:1_guide_2_makeholder_9.png?675}}