title: whether it is possible find (in a runtime) all subclasses (which mixing some trait) using scala 2.10
body: <p>i need find all subclasses which mixing some trait (i won't do this in a runtime). I know tool written in scala (ClassUtil) but this tool is slow. Also I know one tool written in java (fasters than ClassUtil), but if I have choice I wouldn't rather using external libraries - so my question is: scala 2.10 have support resolving my problem?</p>