public class MyDslScopeProvider extends AbstractDeclarativeScopeProvider {
	
	public IScope scope_ActionStatement_action(final ActionStatement context, EReference ref) {
		//get the tail end of the resource path
		classs tailResource = context.getPath().getVariable().getResource();
		List<IEObjectDescription> scope = new ArrayList<IEObjectDescription>();
		for (Feature o : tailResource.getFeature()) {
			if (o instanceof function) {
				function f = (function) o;
				Map<String, String> data = new HashMap<String, String>();
				String sig = "(" + StringUtils.join(f.getParameters(), ",")+ ")";
				data.put("sig", sig);
				IEObjectDescription d = EObjectDescription.create(QualifiedName.create(f.getName()), f, data);
				scope.add(d);
			}
		}
		return new SimpleScope(scope);
		}

}

public class MyDslProposalProvider extends AbstractMyDslProposalProvider {
	
	@Override
	protected StyledString getStyledDisplayString(
			IEObjectDescription description) {
		if (description.getEClass().equals(MyDslPackage.Literals.FUNCTION)) {
			return new StyledString(description.getName().toString() + (description.getUserData("sig") == null ? "" : description.getUserData("sig")));
		}
		return super.getStyledDisplayString(description);
	}

}