PermutationBinaryOperator (JavaPermutationTools - A Java library for computation on permutations)

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 PermutationBinaryOperator
```
A functional interface for defining custom binary operators on Permutations. See the Permutation.apply(PermutationBinaryOperator,Permutation) method.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`apply(int[] rawPermutation1, int[] rawPermutation2)`	Applies an operator on the raw representations of a pair of Permutations.

- Method Detail
  - apply
```
void apply(int[] rawPermutation1,
           int[] rawPermutation2)
```
    Applies an operator on the raw representations of a pair of Permutations. Implementers of this interface are responsible for ensuring that the apply method maintains valid permutations of the integers in {0, 1, ..., rawPermutation1.length - 1 }, and likewise for rawPermutation2.
    
    Parameters:
    
    rawPermutation1 - A reference to the raw array of ints underlying a Permutation object. Changes to this array will directly change the Permutation object that encapsulates it.
    
    rawPermutation2 - A reference to the raw array of ints underlying a Permutation object. Changes to this array will directly change the Permutation object that encapsulates it.