rollup/test/form/side-effect-k/foo.js

export function augment ( x ) {
	var prop, source;

	var i = arguments.length;
	var sources = Array( i - 1 );
	while ( i-- ) {
		sources[i-1] = arguments[i];
	}

	while (source = sources.shift()) {
		for (prop in source) {
			if (hasOwn.call(source, prop)) {
				x[prop] = source[prop];
			}
		}
	}

	return x;
}