class Fugit::Duration

def common_rewrite_dur(t)
  t
    .subgather(nil)
    .inject({}) { |h, tt|
      v = tt.string; v = v.index('.') ? v.to_f : v.to_i
        # drops ending ("y", "m", ...) by itself
      h[tt.name] = (h[tt.name] || 0) + v
      h }
end