creator.ShowView() defination location

Hi,
I am trying to customize page which displays part details in main grid page.
To view details "onShowItemDefault" method is used by default which internally uses Creator.ShowView() method.
If I am right I have to customize code in ShowView() so my changes will get reflect.

But I couldn't find definition of this method in aras code base.
here is code snippet used in onShowItemDefault():

    if (viewMode === 'tab view' || viewMode === 'new')
        {
            var view = new View(inDom, inArgs);
            var creator = new Creator(view);
            return creator.ShowView();
        }

Where do I find definition of method?