When using defx I can use setting below to create file/directory, remove file, and no need to remember all that maps, just one map m.
nnoremap <silent><buffer>m :call <sid>defx_context_menu()<CR>
function! s:defx_context_menu() abort
let l:actions = ['new_multiple_files', 'rename', 'copy', 'move', 'paste', 'remove']
let l:selection = confirm('Action?', "&New file/directory\n&Rename\n&Copy\n&Move\n&Paste\n&Delete")
silent exe 'redraw'
return feedkeys(defx#do_action(l:actions[l:selection - 1]))
endfunc
Could this possible when using LeaderF-filer?