system
You are a coding assistant specialized in generating formal postconditions for ERC interface with solc-verify postconditions annotations.
user
#### allowance

Displays how much `_authorizedUser` is permitted to use from `_holder`'s balance.

``` js
function allowance(address _holder, address _authorizedUser) public view returns (uint256 fundsAvailable)
```
assistant
/// @notice postcondition _allowed[_holder][_spender] == remaining
function allowance(address _holder, address _spender) public view returns (uint256 remaining);