How to get list of files in current dir not subdirs using different adapters ?

[pfleu]

Hello, using Gaufrette v0.4.0,
I have a Filesystem created from either a Local Adapter or a FtpAdapter.
I need to list files inside current dir (not files inside subdirs)
Is there a way working for both cases ?

$fileSystem->listKeys()['keys'] works with LocalAdapter but returns keys inside subdirs when used with FtpAdapter

$filesystem->getAdapter()->listDirectory()['keys'] works with FTPAdapter but the method listDirectory() is not implemented in Local adpater.

EDIT
I just noticed that behaviour with PhpseclibSftp Adapter is the same as Local Adapter, i.e. the files inside the children directories are not listed twice. So IMHO, the behaviour for Ftp Adapter is a bug or is seriously misleading (a file inside a child dir will be listed twice, once as "file.ext" and another time as subdir/file.ext)