breaks: k - 1 Centers of the blending zones. dists[i] will blend into dists[i + 1] around breaks[i].
bandwidths: k - 1 Radii of the blending zones. The i-th blending zone will begin at breaks[i] - bandwidths[i] and end at breaks[i] + bandwidths[i]. A bandwidth of 0 corresponds to a hard cut-off, i.e. a jump discontinuity in the density of the blended Distribution.