def barplot(self, canvas, x, height, width=0.8, bottom=0, color=None, label=None, **kwargs):
        """
        Plot vertical bar plot centered at x with height 
        and width of bars. The y level is at bottom.
        
        the kwargs are plotting library specific kwargs!

        :param array-like x: the center points of the bars
        :param array-like height: the height of the bars
        :param array-like width: the width of the bars
        :param array-like bottom: the start y level of the bars
        :param kwargs: kwargs for the specific library you are using.
        """
        raise NotImplementedError("Implement all plot functions in AbstractPlottingLibrary in order to use your own plotting library")
def barplot ( self , canvas , x , height , width = 0.8 , bottom = 0 , color = None , label = None , ** kwargs ) : raise NotImplementedError ( "Implement all plot functions in AbstractPlottingLibrary in order to use your own plotting library" )
Plot vertical bar plot centered at x with height 
        and width of bars. The y level is at bottom.
        
        the kwargs are plotting library specific kwargs!

        :param array-like x: the center points of the bars
        :param array-like height: the height of the bars
        :param array-like width: the width of the bars
        :param array-like bottom: the start y level of the bars
        :param kwargs: kwargs for the specific library you are using.