[Qgis-user] How can I call pluginA from pluginB?

[荻原]

Hi!
I would like to ask a question how to call different plugin from a plugin.

I made two plugin using  plugin builder .

when I want to use plugin, I click plugin Icon in toolbar or menu,and
the main window open.
(That plugin is dockwidget plugin)

I would like to do that from plugin.
when I click  one button in pluginA , pluginB Main Window Open,That's it.

If anyone know that solution, please help me .
thank you for reading my question.

Ryo Ogiwara