def Class<? extends DocumentSymbolNameProvider> bindDocumentSymbolNameProvider() {
		return CustomDocumentSymbolNameProvider
	}

	@Override
	public String getNameLabel(Object element) {
		if (element instanceof EObject) {
			String name = SimpleAttributeResolver.NAME_RESOLVER.apply(((EObject) element));
			String type = element.getClass().toString();
			String label = type + name;
			return label

public Class<? extends SimpleNameLabelProvider> bindSimpleNameLabelProvider() {
		return customNameLabelProvider.class;
	}

@Override
    public String getNameLabel(Object element) {
       
        BufferedWriter out = null;

        try {
            FileWriter fstream = new FileWriter("F:\\Research\\Workbench\\out.txt", true); //true tells to append data.
            out = new BufferedWriter(fstream);
            out.write("I'm in the custom name label provider\n");
        }

        catch (IOException e) {
            System.err.println("Error: " + e.getMessage());
        }

       
        if (element instanceof EObject) {
            String name = SimpleAttributeResolver.NAME_RESOLVER.apply(((EObject) element));
            String type = element.getClass().toString();
            String ideName = type + name;
            try {
                out.write(ideName + "\n");
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            return ideName;
            //return SimpleAttributeResolver.NAME_RESOLVER.apply(((EObject) element));
        } else if (element instanceof IEObjectDescription) {
            String name = ((IEObjectDescription) element).getName().getLastSegment();
            String type = element.getClass().toString();
            String ideName = type + name;
            try {
                out.write(ideName + "\n");
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            return ideName;
            //return ((IEObjectDescription) element).getName().getLastSegment();
           
        }
        return null;
    }

public Class<customNameLabelProvider> bindSimpleNameLabelProvider() throws IOException{
        BufferedWriter out = null;

        try {
            FileWriter fstream = new FileWriter("F:\\Research\\Workbench\\out.txt", true); //true tells to append data.
            out = new BufferedWriter(fstream);
            out.write("The binding did stuff\n");
        }

        catch (IOException e) {
            out.write("Error: " + e.getMessage() + "\n");
        }

        finally {
            if(out != null) {
                out.close();
            }
        }
        return customNameLabelProvider.class;
    }

class McnpIdeModule extends AbstractMcnpIdeModule {
	public Class<CustomNameLabelProvider> bindSimpleNameLabelProvider() throws IOException{

        BufferedWriter out = null;

        try {
            FileWriter fstream = new FileWriter("F:\\Research\\Workbench\\out.txt", true); //true tells to append data.
            out = new BufferedWriter(fstream);
            out.write("The binding did stuff\n");
        }

        catch (IOException e) {
            out.write("Error: " + e.getMessage() + "\n");
        }

        finally {
            if(out != null) {
                out.close();
            }
        }
        return customNameLabelProvider.class;
    }
}

class McnpIdeModule extends AbstractMcnpIdeModule {
	public Class<? extends SimpleNameLabelProvider> bindSimpleNameLabelProvider() {
		return CustomNameLabelProvider.class;
	}
}

public class CustomDocumentSymbolNameProvider extends DocumentSymbolMapper.DocumentSymbolNameProvider {
	@Override
	public String getName(EObject object) {
		String r  = super.getName(object);
		return r == null ? null : r + "Lala";
	}
}

public class MyDslIdeModule extends AbstractMyDslIdeModule {
	public Class<? extends DocumentSymbolMapper.DocumentSymbolNameProvider> bindDocumentSymbolMapper$DocumentSymbolNameProvider() {
		return CustomDocumentSymbolNameProvider.class;
	}
}

package org.xtext.example.mydsl.tests

import org.eclipse.lsp4j.ClientCapabilities
import org.eclipse.lsp4j.DocumentSymbolCapabilities
import org.eclipse.lsp4j.InitializeParams
import org.eclipse.lsp4j.TextDocumentClientCapabilities
import org.eclipse.xtext.testing.AbstractLanguageServerTest
import org.junit.jupiter.api.Test

class DocumentSymbolTest extends AbstractLanguageServerTest {

	new() {
		super("mydsl")
	}

	static val (InitializeParams)=>void INITIALIZER = [
		capabilities = new ClientCapabilities() => [
			textDocument = new TextDocumentClientCapabilities() => [
				documentSymbol = new DocumentSymbolCapabilities() => [
					it.hierarchicalDocumentSymbolSupport = true;
				];
			];
		];
	];

	@Test
	def void testDocumentSymbol_01() {
		testDocumentSymbol[
			initializer = INITIALIZER
			model = '''
				Hello A!
				Hello B!
			'''
			expectedSymbols = '''
				symbol "ALala" {
				    kind: 7
				    range: [[0, 0] .. [0, 8]]
				    selectionRange: [[0, 6] .. [0, 7]]
				    details: 
				    deprecated: false
				}
				symbol "BLala" {
				    kind: 7
				    range: [[1, 0] .. [1, 8]]
				    selectionRange: [[1, 6] .. [1, 7]]
				    details: 
				    deprecated: false
				}

			'''
		]

	}

}