[Request] sw equivalent for weights

[FBrunamonti]

I often need to run the same regression with different sets of weights, and compare results. For example:

df <- tribble(
  ~country,       ~gdp,    ~interest_rate, ~population, ~weights,
  "Country A",   50000,          3.5,      1000000,     0.1,
  "Country B",   80000,          4.2,      5000000,     0.15,
  "Country C",   120000,         2.8,      8000000,     0.2,
  "Country D",   25000,          5.0,      2000000,     0.05
)

formula = as.formula("gdp ~ interest_rate")

reg1 <- feols(formula, data = df, weights = 1)
reg2 <- feols(formula, data = df, weights = ~population)
reg3 <- feols(formula, data = df, weights = ~weights)

etable(list(reg1, reg2, reg3))

Is it possible to have an equivalent version of the sw function for weights, so that it would be possible to specify a single regression, and run it over different sets of weights?