'Grow lower secondary clients
Will grow all secondary clients below the specified index by an equal
share of the provided amount.'

def grow_down_shared(self, cidx, amt):

    per_amt = (amt / ((len(self.relative_sizes) - 1) - cidx))
    for idx in range((cidx + 1), len(self.relative_sizes)):
        self.grow(idx, per_amt)
