BloombergLP::bdljsn::Json::insert

Insert the specified member into the JsonObject held by this object if the key of member does not already exist; otherwise, this method has no effect. Return a pair whose first member is an iterator referring to the (possibly newly inserted) Member object whose key matches, and whose second member is true if a new value was inserted, and false otherwise. If isNull(), then the type is changed to object. The behavior is undefined unless isObject() or isNull(), and unless member.first is valid UTF‐8 (see bdlde::Utf8Util::isValid).