'Create a ViewBox and place it in the next available cell (or in the cell specified)
All extra keyword arguments are passed to :func:`ViewBox.__init__ <pyqtgraph.ViewBox.__init__>`
Returns the created item.'

def addViewBox(self, row=None, col=None, rowspan=1, colspan=1, **kargs):

    vb = ViewBox(**kargs)
    self.addItem(vb, row, col, rowspan, colspan)
    return vb
