ImportDeclaration: 
'import' ('static')? import = QualifiedNameWithWildcard ';'

QualifiedNameWithWildcard:
  QualifiedName '.*'?
;

QualifiedName:
  ID ('.' ID)*
;

@Inject
ITypesProposalProvider javaProposal;
@Inject
ITypeProvider.Factory typeProviderFactory;
...
ResourceSet set = model.eResource().getResourceSet();
ITypeProvider tp = typeProviderFactory.findTypeProvider(set);
if (tp == null) {
     tp = typeProviderFactory.createTypeProvider(set);
}
if (tp == null) {
     return;
}try {
  JvmType t = tp.findTypeByName(java.util.Iterator.class.getName());
  Filter filter = TypeMatchFilters.and(TypeMatchFilters.isPublic(), TypeMatchFilters.canInstantiate());
  javaProposal.createSubTypeProposals(t, this, context, filter, acceptor);
} catch (TypeNotFoundException e) {}