Cannot add a return statement to a graphql service using the Service Design view

[azinneera]

Description

I was able to add a GraphQL service through the Service Design view in the Ballerina Visualizer and add a query operation but wasn't able to add a return statement. Had to switch to the flow diagram view to add the return statement.

Steps to Reproduce

1. Add a GraphQL service via the Design Diagram -> Add Artifact.
2. Add a query operation using Create Operation in the GraqhQL Diagram view

Version

5.0.4

Environment Details (with versions)

No response