| Package | Description | 
|---|---|
| org.springframework.boot.util | Contains miscellaneous utility classes. | 
| Class and Description | 
|---|
| LambdaSafe.Callback Represents a single callback that can be invoked in a lambda safe way. | 
| LambdaSafe.Callbacks Represents a collection of callbacks that can be invoked in a lambda safe way. | 
| LambdaSafe.InvocationResult The result of a callback which may be a value,  nullor absent entirely if
the callback wasn't suitable. | 
| LambdaSafe.LambdaSafeCallback Abstract base class for lambda safe callbacks. | 
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