src/Helper.php
public static function data_fill(&$target, $key, $value)
    {
        return self::data_set($target, $key, $value, false);
    }
public static function data_fill(&$target, $key, $value)
    {
        return self::data_set($target, $key, $value, false);
    }
public static function data_fill ( & $ target , $ key , $ value ) { return self :: data_set ( $ target , $ key , $ value , false ) ; }
Fill in data where it's missing.

@param  mixed   $target
@param  string|array  $key
@param  mixed  $value
@return mixed
Fill in data where it s missing .