getMap method
Implementation
RadMap getMap(String key) {
if (_value.containsKey(key)) {
var value = _value[key];
if (value.runtimeType == RadMap) {
return value as RadMap;
} else {
throw RadError('RadMap', 'getInteger', 'value is not a map.');
}
} else {
throw RadError('RadMap', 'getInteger', 'key $key is not in the Map.');
}
}