Here is a list of all struct and union fields with links to the structures/unions they belong to:

- u -

• Uint32Value() : Value
• Uncompilable() : NonCopyablePersistentTraits< T >
• Undefined : Handle< T >
• UniqueId() : UniqueId
• UniquePersistent : PersistentBase< T > , UniquePersistent< T >
• UNKNOWN_ENCODING : String
• Unlocker() : Unlocker
• UpdateNodeFlag() : Internals
• UpdateNodeState() : Internals
• UseCounterCallback : Isolate
• UseCounterFeature : Isolate
• used_heap_size() : HeapStatistics
• UseDefaultSecurityToken() : Context
• user_data : JitCodeEvent
• Utf8Length() : String
• Utf8Value() : String::Utf8Value
• Utils : Handle< T > , Local< T > , Persistent< T, M > , PersistentBase< T >