extjs scope of renderer
Inside a tabpanel, there is an object like this:

    tabpanel.counter = 3;

Inisde the tabpanel, there is a tab t. Inside t, there is a gridpanel. One of the columns in the gridpanel needs to use a renderer. In the renderer function, the record, store, cell, row , column etc are available.  
   
But in the renderer function, is there a way to access the counter object defined at the tabpanel scope? What is the scope in which the renderer function runs by default? ColumnModel or GridPanel?
extjs scope of renderer
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Inside a tabpanel, there is an object like this:

    tabpanel.counter = 3;

Inisde the tabpanel, there is a tab t. Inside t, there is a gridpanel. One of the columns in the gridpanel needs to use a renderer. In the renderer function, the record, store, cell, row , column etc are available.  
   
But in the renderer function, is there a way to access the counter object defined at the tabpanel scope? What is the scope in which the renderer function runs by default? ColumnModel or GridPanel?