/**
* Creates a new {@code JSONObject} by copying mappings for the listed names
* from the given object. Names that aren't present in {@code copyFrom} will
* be skipped.
*/
public JsonObject(JsonObject copyFrom, string[] names) : this()
{
foreach (string name in names)
{
object value = copyFrom.Opt(name);
if (value != null)
{
nameValuePairs[name] = value;
}
}
}