function mkdir( $path, /* Optional args are ignored */ $chmod = false, $chown = false, $chgrp = false ) {
		$path = trailingslashit( $path );

		$parent_node = $this->locate_parent_node( $path );
		if ( ! $parent_node ) {
			$dirname = str_replace( '\\', '/', dirname( $path ) );
			$this->mkdir( $dirname );
			$parent_node = $this->locate_parent_node( $path );
			if ( ! $parent_node )
				return false;
		}

		$node = new MockFS_Directory_Node( $path );

		$parent_node->children[ $node->name ] = $node;
		$this->fs_map[ $path ] = $node;

		return true;
	}