getValue method
- {dynamic onUnknownValue(
- dynamic value
Returns a local Dart copy of the remote Dart object.
This creates a copy of all copyable objects with corresponding VMInstanceRef subclasses. If an uncopyable or unknown instance is encountered, an UnsupportedError is thrown. If an instance has exired, a VMSentinelException is thrown.
If onUnknownValue
is provided, it's called with any uncopyable instances
or sentinels that are encountered. Its return value is used as the value
of that instance or sentinel. It may return a Future, in which case the
completion value of the future is used.
This is safe to use with object graphs that contain loops. Within the
scope of a call to getValue, including within calls to onUnknownValue
,
return values are cached, so multiple calls to getValue for the same
instance will return identical Dart objects.
Implementation
Future<T> getValue({onUnknownValue(value)}) =>
super.getValue(onUnknownValue: onUnknownValue).then((v) => v as T);