public List<MyGrammarEntity> getEntities()
{
 // create the new list and return
}

public EList<MyGrammarEntity> get...()

import ecore;
import xtext;

process( GeneratedMetamodel this ):
    process( ePackage );

process( EPackage this ):
    eClassifiers.process();

process( EClassifier this ):
    null;

process( EClass this ):
    eStructuralFeatures.process() ->
     
    // enrich the grammar elements with schema-specific attributes
    if name == "WMLExpression" then {

        createOperation( "isWMLKey", 
            "return ( this instanceof WMLKey );", eboolean() ) ->

        createGenericOperation( "getWMLTags", "return null;", ecoreType( "EEList" ),
            wmlType( "WMLTag" ) )
    };

createOperation( EClass this, String name, String body, EClassifier returnType ):
    let op = newOperation( name, returnType) : newAnnotation( op, body ); 

create EOperation this newOperation( EClass owner, String name, EClassifier returnType ) :
    setName( name ) -> setEType( returnType ) ->
    owner.eOperations.add( this );

createGenericOperation( EClass this, String name, String body, EClassifier genericType,
        EClassifier typeArgument ):
    let op = newGenericOperation( name, createGenericType( genericType, typeArgument ) ) 
        : newAnnotation( op, body ); 

create EGenericType this createGenericType( EClassifier type, EClassifier argumentType ):
    let genType = new EGenericType : 
        setEClassifier( type ) ->
        eTypeArguments.add( let gen = new EGenericType : gen.setEClassifier( argumentType ) );

create EOperation this newGenericOperation( EClass owner, String name, EGenericType type ):
    setName( name ) -> setEGenericType( type ) ->
    owner.eOperations.add( this );

create EAnnotation this newAnnotation( EOperation op, String value ):
    let an = new EStringToStringMapEntry :
        setSource( "http://www.eclipse.org/emf/2002/GenModel" ) ->
        an.setKey( "body" ) -> 
        an.setValue( value ) ->
        details.add( an ) ->
        op.eAnnotations.add( this );
    

EDataType estring(): ecoreType( "EString" );
EDataType echar(): ecoreType( "EChar" );
EDataType eboolean(): ecoreType( "EBoolean" );

EClassifier wmlType( String name ):
    wmlPackage().getEClassifier( name );

EPackage wmlPackage():
    JAVA org.wesnoth.wml.impl.WmlPackageImpl.init();

EClassifier ecoreType( String name ) :
    ecorePackage().getEClassifier( name );

EPackage ecorePackage(): 
    JAVA org.eclipse.emf.ecore.impl.EcorePackageImpl.init();