How do you change the values in a data.table column within a function?

```
DF = data.table(ID = c("b","b","b","a","a","c"), a = 1:6, b = 7:12, c = 13:18)

change_it <- function(data_table) {
    data_table[[column]] <- 73
}

column = 'a'

change_it(DF, column) # Nothing happens because data_table is not a reference (or something)

DF[[column]] <- 73 # The change happens

```