function mergeDefaults(raw, defaults) {
    var props = isArray(raw)
        ? raw.reduce(function (normalized, p) { return ((normalized[p] = {}), normalized); }, {})
        : raw;
    for (var key in defaults) {
        var opt = props[key];
        if (opt) {
            if (isArray(opt) || isFunction(opt)) {
                props[key] = { type: opt, default: defaults[key] };
            }
            else {
                opt.default = defaults[key];
            }
        }
        else if (opt === null) {
            props[key] = { default: defaults[key] };
        }
        else if (true) {
            warn$2("props default key \"".concat(key, "\" has no corresponding declaration."));
        }
    }
    return props;
}
Runtime helper for merging default declarations. Imported by compiled code
only.
@internal