As discussed in #142, worth considering if `fct_lump()` should be split up into `fct_lump_prop()` and `fct_lump_n()`. `fct_lump_min()` has been been created.
As discussed in #142, worth considering if
fct_lump()should be split up intofct_lump_prop()andfct_lump_n().fct_lump_min()has been been created.