/**
Returns a new string in which all occurrences of a target string in the
receiver are replaced by another given string.
\param target
\param replacement
\returns RTString
*/
public function stringByReplacingOccurrencesOfString_withString(RTString $target, RTString $replacement)
{
return RTString::stringWithString(str_replace($target->description(), $replacement->description(), $this->description()));
}
