Collection of Features

[tristanlins]

Please do not discuss the features in this issue, use a separate issue and reference this one.

[tristanlins]

Resolve files:

interface Compat {
    /**
     * Resolve a file source and return the pathname.
     *
     * @param string|int|FilesModel $file
     *     The file source.
     * @param string $fallback
     *     If not *null* Test if the file really exists in the filesystem and if not, return $fallback.
     *     $fallback = false means, check for existence and return *false* if file not exists.
     *
     * @return string The pathname to the file.
     */
    public function resolveFile($file, $fallback = null);
}