Calling a function in a parent scene from an overlay without hiding it

I have a button in an overlay, I want the button call a function in the parent scene of the current overlay but without hiding it. I have seen the example of how to call a function in the parent scene but I only call “parent” function since scene events…

I answer my self:

In parent scene(‘mysceneparent’) I add the function:

function scene:createObject(type)     print("create object "..type)      end

and in the overlay scene, in the event of the button I add:

composer.getScene( 'mysceneparent' ):createObject('one')

Good job on the self answer, and the exact right solution.  

I answer my self:

In parent scene(‘mysceneparent’) I add the function:

function scene:createObject(type)     print("create object "..type)      end

and in the overlay scene, in the event of the button I add:

composer.getScene( 'mysceneparent' ):createObject('one')

Good job on the self answer, and the exact right solution.