@cran/lib.gql.core/mjs/utilities/extension.js

GQL Core Functionality

export function getExtensions(extendable) {
    return (extendable.extensions ??= {});
}
export function hasExtension(extendable, key) {
    return key in getExtensions(extendable);
}
export function getExtension(extendable, key, fallback) {
    const extensions = getExtensions(extendable);
    return (extensions[key] ??= fallback);
}
export function setExtension(extendable, key, value) {
    getExtensions(extendable)[key] = value;
}