mergePartials.js

function mergePartials(partials) {
    const types = [];
    const resolvers = [];

    for (const partial of partials) {
        resolvers.push(partial.resolvers);
        Array.isArray(partial.types) ? types.push(...partial.types) : types.push(partial.types);
    }

    addEmptyRootTypes(types, resolvers);

    const mergedResolvers = merge({}, ...resolvers);

    return makeExecutableSchema({ typeDefs: types, resolvers: mergedResolvers });
};