SignatureSubpacketsFunction (Bouncy Castle Library 1.80 API Specification)

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
```
@FunctionalInterface
public interface SignatureSubpacketsFunction
```
Callback to modify the contents of a PGPSignatureSubpacketGenerator. The OpenPGPV6KeyGenerator already prepopulates the hashed subpacket areas of signatures during key generation. This callback is useful to apply custom changes to the hashed subpacket area during the generation process.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`PGPSignatureSubpacketGenerator`	`apply(PGPSignatureSubpacketGenerator subpackets)`	Apply some changes to the given `PGPSignatureSubpacketGenerator` and return the result.

- Method Detail
  - apply
```
PGPSignatureSubpacketGenerator apply(PGPSignatureSubpacketGenerator subpackets)
```
    Apply some changes to the given PGPSignatureSubpacketGenerator and return the result. It is also possible to replace the whole PGPSignatureSubpacketGenerator by returning another instance. Tipp: In order to replace a subpacket, make sure to prevent duplicates by first removing subpackets of the same type using PGPSignatureSubpacketGenerator.removePacketsOfType(int). To inspect the current contents of the generator, it is best to call PGPSignatureSubpacketGenerator.generate() and in turn inspect its contents using PGPSignatureSubpacketVector.toArray().
    
    Parameters:
    
    subpackets - original subpackets
    
    Returns:
    
    non-null modified subpackets