def METHOD_NAME(self, varName, values ):
    a = self.vecvars[varName]
    if isinstance(a, numpy.ndarray):
        for (i,v) in enumerate(values):
            a[i]=v
    else:
        if isinstance(a, ROOT.TObject) and a.ClassName() == "TClonesArray":
            a.ExpandCreateFast(len(values))
        fillit = self.fillers[varName]
        for (i,v) in enumerate(values):
            fillit(a[i],v)