I'm trying to define a command that can take a range and pass it to a function. This is what I thought I should have:

```
function! PrintGivenRange() range
    echo "firstline ".a:firstline." lastline ".a:lastline
    " Do some more things
endfunction

command! -range PassRange call PrintGivenRange()

```

However, it doesn't work that way, it seems to only pass the first line.

e.g. 

```
:1,5PassRange "outputs firstline 1 lastline 1
:1,5call PrintGivenRange() "outputs firstline 1 lastline 5
" if you select lines in visual mode, same thing for both

```

I've read `:help command-range` already but still haven't been able to figure this out. Am I supposed to pass the range in the prefix to the `call`? How do I fix this?