lib/lmd_common.js
function (config, mixins) {
    if (Array.isArray(config.mixins) && Array.isArray(mixins)) {
        config.mixins.push.apply(config.mixins, mixins);
        return config;
    }

    return deepDestructableMerge(config, {
        mixins: mixins
    });
}
function (config, mixins) {
    if (Array.isArray(config.mixins) && Array.isArray(mixins)) {
        config.mixins.push.apply(config.mixins, mixins);
        return config;
    }

    return deepDestructableMerge(config, {
        mixins: mixins
    });
}
Merges mixins with config

@param {Object} config
@param {String[]} mixins