Returns the schema found at the current index for this combo box.
        
        :return        <orb.TableSchema> || None

def currentSchema( self ):
        """
        Returns the schema found at the current index for this combo box.
        
        :return        <orb.TableSchema> || None
        """
        index = self.currentIndex()
        if ( 0 <= index and index < len(self._schemas) ):
            return self._schemas[index]
        return None