abi: function overloading

[olegrok]

Imagine I have following contract:

pragma solidity ^0.8.0;

contract IncrementerExtended {
    uint256 private value;

    constructor(uint256 initialValue) {
        value = initialValue;
    }

    function increment() public {
        value += 1;
    }

    function increment(uint256 amount) public {
        value += amount;
    }

    receive() external payable {}

    function get() public view returns(uint256) {
        return value;
    }
}

How can I work with both "increment" methods from Go abi module.
If I try to call abi.Pack("increment") without any arguments it returns an error. And it works for abi.Pack("increment", big.NewInt(5)).

From the code I see that methods are stored in a map. And only one element can have "increment" name:

erigon/accounts/abi/abi.go

Line 76 in f22317e

method, exist := abi.Methods[name]

Is it a bug or feature? How should we work with such functions?