byte[][] (Groovy JDK enhancements)

Methods Summary

Methods
Return type	Name and parameters
`List`	`flatten()` Flattens a 2D array into a new collection.
`byte[][]`	`transpose()` A transpose method for 2D byte arrays.

- Methods Detail
  - public List flatten()
    
    Flattens a 2D array into a new collection. The items are copied row by row.
    Example usage:
```
byte[][] array = [[0, 1], [2, 3]]
assert array.flatten() == [0, 1, 2, 3]
```
    Returns:
    
    a Collection of the array elements
    
    Since:
    
    5.0.0
  - public byte[][] transpose()
    
    A transpose method for 2D byte arrays.
    Example usage:
```
byte[][] bytes = [[1, 10], [2, 20]]
byte[][] expected = [[1, 2], [10, 20]]
def result = bytes.transpose()
assert result == expected
assert bytes.class.componentType == result.class.componentType
```
    Returns:
    
    the transposed 2D byte array
    
    Since:
    
    5.0.0