var grammarURI = "classpath:/sfg/lng/LNG.xtext"
var file.extensions = "lng"
var projectName = "sfg.lng.lng"
var runtimeProject = "../${projectName}"

Workflow {
    bean = StandaloneSetup {
            scanClassPath = true
            platformUri = "${runtimeProject}/.."
            // The following two lines can be removed, if Xbase is not used.
            registerGeneratedEPackage = "org.eclipse.xtext.xbase.XbasePackage"
            registerGenModelFile = "platform:/resource/org.eclipse.xtext.xbase/model/Xbase.genmodel"
        	registerGenModelFile = "platform:/resource/sfg.lng.lng2/src-gen/sfg/lng/lng2.genmodel"
        }
    
        component = DirectoryCleaner {
            directory = "${runtimeProject}/src-gen"
        }
    
        component = DirectoryCleaner {
            directory = "${runtimeProject}.ui/src-gen"
        }
    
        component = Generator {
            pathRtProject = runtimeProject
            pathUiProject = "${runtimeProject}.ui"
            pathTestProject = "${runtimeProject}.tests"
            projectNameRt = projectName
            projectNameUi = "${projectName}.ui"
            language = {
                uri = grammarURI
                fileExtensions = file.extensions
    
                // Java API to access grammar elements (required by several other fragments)
                fragment = grammarAccess.GrammarAccessFragment {}
    
                // generates Java API for the generated EPackages
                fragment = ecore.EcoreGeneratorFragment {
                // referencedGenModels = "
                //  platform:/resource/org.eclipse.xtext.xbase/model/Xbase.genmodel,
                //  platform:/resource/org.eclipse.xtext.common.types/model/JavaVMTypes.genmodel
                // "
                }
    
                // Serializer 2.0
                fragment = serializer.SerializerFragment {
                	generateStub = false
                }
                
                // the serialization component (1.0)
                // fragment = parseTreeConstructor.ParseTreeConstructorFragment {}
    
                // a custom ResourceFactory for use with EMF
                fragment = resourceFactory.ResourceFactoryFragment {
                    fileExtensions = file.extensions
                }
    
                // The antlr parser generator fragment.
                fragment = parser.antlr.XtextAntlrGeneratorFragment {
                //  options = {
                //      backtrack = true
                //  }
                }
    
                // java-based API for validation
                fragment = validation.JavaValidatorFragment {
                //    composedCheck = "org.eclipse.xtext.validation.ImportUriValidator"
                //    composedCheck = "org.eclipse.xtext.validation.NamesAreUniqueValidator"
                }
    
                // scoping and exporting API
                fragment = scoping.ImportURIScopingFragment {}
                fragment = exporting.SimpleNamesFragment {}
    
                // scoping and exporting API
                fragment = scoping.ImportNamespacesScopingFragment {}
                fragment = exporting.QualifiedNamesFragment {}
                fragment = builder.BuilderIntegrationFragment {}
    
                // generator API
                fragment = generator.GeneratorFragment {
                    generateMwe = false
                    generateJavaMain = false
                }
    
                // formatter API
                fragment = formatting.FormatterFragment {}
    
                // labeling API
                fragment = labeling.LabelProviderFragment {}
    
                // outline API
                fragment = outline.OutlineTreeProviderFragment {}
                fragment = outline.QuickOutlineFragment {}
    
                // quickfix API
                fragment = quickfix.QuickfixProviderFragment {}
    
                // content assist API
                fragment = contentAssist.JavaBasedContentAssistFragment {}
    
                // generates a more lightweight Antlr parser and lexer tailored for content assist
                fragment = parser.antlr.XtextAntlrUiGeneratorFragment {}
    
                // generates junit test support classes into Generator#pathTestProject
                fragment = junit.Junit4Fragment {}
    
                // project wizard (optional)
                // fragment = projectWizard.SimpleProjectWizardFragment {
                //      generatorProjectName = "${projectName}"
                //      modelFileExtension = file.extensions
                // }
    
                // rename refactoring
                fragment = refactoring.RefactorElementNameFragment {}
    
                // provides the necessary bindings for java types integration
               // fragment = types.TypesGeneratorFragment {}
    
                // generates the required bindings only if the grammar inherits from Xbase
                fragment = xbase.XbaseGeneratorFragment {}
    
                // provides a preference page for template proposals
                fragment = templates.CodetemplatesGeneratorFragment {}
    
                // provides a compare view
                fragment = compare.CompareFragment {
                     fileExtensions = file.extensions
                }
    
            }
        }
}

Caused by: org.eclipse.emf.mwe.core.ConfigurationException: Couldn't find an interface <registered package> at org.eclipse.emf.mwe.utils.StandaloneSetup.addRegisterGeneratedEPackage(StandaloneSetup.java:309)

// scoping and exporting API
                fragment = scoping.ImportURIScopingFragment {}
                fragment = exporting.SimpleNamesFragment {}
    
                // scoping and exporting API
                fragment = scoping.ImportNamespacesScopingFragment {}
                fragment = exporting.QualifiedNamesFragment {}
                fragment = builder.BuilderIntegrationFragment {}