fixing error importing es language

gulliver/system/class.g.php

@@ -3701,23 +3701,35 @@ class G
     }
 
     /**
-     * Recursive Is writeable function
+     * Recursively checks if all files in a directory are writable.
      *
-     * @author Erik Amaru Ortiz <erik@colosa.com>
+     * This function scans the specified directory and checks the write permissions
+     * of all files that match the given pattern. If any file is not writable,
+     * the function returns false; otherwise, it returns true.
      *
-     * @param $path path to scan recursively the write permission
-     * @param $pattern pattern to filter some specified files
-     * @return <boolean> if the $path, assuming that is a directory -> all files in it are writeables or not
+     * @param string $path   The path to the directory to scan recursively.
+     * @param string $pattern The pattern to filter specific files (default is '*').
+     * @return bool         Returns true if all files are writable, false otherwise.
+     * @throws InvalidArgumentException If the provided path is not a directory.
      */
-    public static function is_rwritable($path, $pattern = '*')
+    public static function is_rwritable(string $path, string $pattern = '*'): bool
     {
+        // Check if the provided path is a directory
+        if (!is_dir($path)) {
+            throw new InvalidArgumentException("The provided path is not a directory: $path");
+        }
+
+        // Retrieve all files matching the pattern
         $files = G::rglob($pattern, 0, $path);
+
+        // Check write permissions for each file
         foreach ($files as $file) {
             if (!is_writable($file)) {
-                return false;
+                return false; // Return false if any file is not writable
             }
         }
-        return true;
+
+        return true; // All files are writable
     }
 
     /**