xpand - How to configure Xtext mwe.Reader to fill the root element in a slot -

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i using xtext 2.0 mwe 1 , xpand, guess problem mwe 2 , xtend same.

my xtext grammer looks (excerpt):

grammer org.test.test org.eclipse.xtext.common.terminals generate test "http://www.test.org/test/test  model :     "common stuff"      "{"     (formatterdefs+=formatterdef)*     "}"     ...  formatterdef : "formatter" name=id  ":" formatter=string;

when use mwe definiton (excerpt):

<component class="org.eclipse.xtext.mwe.reader" path="${project.src.directory}/xtext/model/" >           <register class="org.test.teststandalonesetup"/>         <load slot='formatterdefs' type='formatterdef'/>         </component>  <component class="org.eclipse.xpand2.generator">     <metamodel class="org.eclipse.xtend.typesystem.emf.emfregistrymetamodel"/>     <expand value="templates::formatter::formattertxt foreach formatterdefs"/> </component>

so slot formatterdefs filled formaterdef, , used template, , every think works fine.

but have templates requires model root element, named model in grammar. tryed use

<load slot='formatterdefs' type='formatterdef'/>

and 

<expand value="templates::main::main foreach model"/>

instead.

but warning:

org.eclipse.xtext.mwe.slotentry - not find exported element of type 'model' -> slot 'model' empty.

and slot contains empty list.

so question is: what need do, root model templates?

i meant like

public class mydslnameprovider extends defaultdeclarativequalifiednameprovider {      qualifiedname qualifiedname(model m) {         return qualifiedname.create(m.eresource().geturi().tostring());     } }  public class mydslruntimemodule extends                           org.xtext.example.mydsl.abstractmydslruntimemodule {      @override     public class<? extends iqualifiednameprovider> bindiqualifiednameprovider() {         return mydslnameprovider.class;     }    }

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