String interpolation in enum definition is marked as incorrect

Version and Environment Details

Operation system: macOS Mojave 10.14.6

IDE name and version: Webstorm 2019.2.3

Plugin version: 2.2.0

Expected Behaviour

The following code snippet:

gql`
  enum FooTypes { ${"foo bar"} }
`

should be interpreted as correct by the plugin, seeing as this is syntactically correct when declaring a graphql schema inside a JS file.

Actual Behaviour

The plugin displays an error stating <enum value definition> expected, got '$'.

Having a schema enum match the JS equivalent is pretty useful for having a single source of truth for specific constants and seeing the IDE mark it as incorrect is somewhat annoying. String interpolation is correctly interpreted in other scenarios I’ve come across, so I guess this just might have been missed.

Steps to Reproduce / Link to Repo with Reproduction and Instructions

import { gql } from 'apollo-server';
const arrayOfThings = ["foo", "bar"];

const schema =  gql`
  enum FooTypes { ${arrayOfThings.join(' ')} }
`;

[benams]

same problem here, it hurts that queries cannot be dynamic

[tinynumbers]

See also https://github.com/jimkyndemeyer/js-graphql-intellij-plugin/issues/417#issuecomment-972212486