Function namedKey

packages/codemirror-graphql/src/variables/mode.ts:107–115

(style: string)

// A namedKey Token which will decorate the state with a `name`
function namedKey(style: string) {
  return {
    style,
    match: (token: Token) => token.kind === 'String',
    update(state: State, token: Token) {
      state.name = token.value.slice(1, -1); // Remove quotes.
    },
  };
}