PredefinedPropagationFields (Brave 5.0.0 API)

```
public class PredefinedPropagationFields
extends PropagationFields
```
Copy-on-write keeps propagation changes in a child context from affecting its parent

Constructors
Modifier	Constructor	Description
`protected`	`PredefinedPropagationFields(PredefinedPropagationFields parent, String... fieldNames)`
`protected`	`PredefinedPropagationFields(String... fieldNames)`

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`String`	`get(int index)`
`String`	`get(String name)`	Returns the value of the field with the specified key or null if not available
`void`	`put(int index, String value)`
`void`	`put(String name, String value)`	Replaces the value of the field with the specified key, ignoring if not a permitted field
`protected void`	`putAllIfAbsent(PropagationFields parent)`	for each field in the input replace the value if the key doesn't already exist
`Map<String,String>`	`toMap()`

Methods inherited from class brave.internal.PropagationFields
find, get, put, toString

protected PredefinedPropagationFields(String... fieldNames)

protected PredefinedPropagationFields(PredefinedPropagationFields parent,
                                      String... fieldNames)

Class PredefinedPropagationFields