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Sum of XOR Pairs

Write a Python function `sum_of_xor_pairs(numbers: List[int]) -> int` that calculates the sum of the XOR of all unique pairs of numbers in the given list. A pair `(a, b)` is considered unique if `a` and `b` are at different indices in the list.

#### Example Usage
```python [main.nopy]
sum_of_xor_pairs([5, 9, 7, 6])
# Output: 47

sum_of_xor_pairs([7, 3, 5])
# Output: 12

sum_of_xor_pairs([7, 3])
# Output: 4
```

#### Constraints
- The input list will contain at least two integers.
- The integers in the list will be non-negative.
from typing import List

def sum_of_xor_pairs(numbers: List[int]) -> int:
    """
    Calculate the sum of XOR of all unique pairs in the list.

    Args:
        numbers (List[int]): A list of integers.

    Returns:
        int: The sum of XOR of all unique pairs.
    """
    # Initialize the result variable
    result = 0
    # Implement the logic to calculate the sum of XOR of all pairs
    # Placeholder for the solution
    return result
Intermediate loopsfunctions
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