bug 2474: rfc 185: Add DTO.toString
bug 2474: rfc 185: Add DTO.toString

Add a toString implementation which produces a
string representation of a DTO suitable for use
during debugging. The format of the string
representation is not specified and subject to
change.

osgi/osgi,osgi/osgi,osgi/osgi,osgi/osgi,osgi/osgi,osgi/osgi,osgi/osgi,osgi/osgi