I have tried to install gwt-user from orbit p2 repository
( http://download.eclipse.org/tools/orbit/downloads/drops/R201 00519200754/repository)
but can't because of "Eclipse-PlatformFilter: (osgi.os=browser)" defined
in MANIFEST.MF of com.google.gwt.user bundle released 2.0.3.v20100419-0751 .
I know that this library is only used at development to generate
target platform to call gwtc compiler for example.