plot.equivalent_shifts plots a representation of all the equivalent
shifts allocations, with a representation of the shifts and their values,
and a coloration of the branches in term of regimes.
"plot"(x, trait = 1, numbering = FALSE, colors_tips = NULL, nbr_col = 3, gray_scale = FALSE, ...)equivalent_shifts, result of
function equivalent_shiftsplot.phylo.plot.phylo for the actual
plotting of the trees.
equivalent_shifts, plot.phylo