Headers.HeaderTransform (kafka 2.8.1 API)

Enclosing interface:

Headers
```
public static interface Headers.HeaderTransform
```
A function to transform the supplied Header. Implementations will likely need to use Header.with(Schema, Object) to create the new instance.

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  Header apply(Header header)
  Transform the given Header and return the updated Header.

- Method Detail
  - apply
```
Header apply(Header header)
```
    Transform the given Header and return the updated Header.
    
    Parameters:
    
    header - the input header; never null
    
    Returns:
    
    the new header, or null if the supplied Header is to be removed