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

Gets the balance of the `_user` account in terms of total tokens owned.

``` js
function balanceOf(address _user) public view returns (uint256 ownedTokens)
```
assistant
/// @notice postcondition tokenBalance == _balances[userAddress_]
function balanceOf(address userAddress_) public view returns (uint256 tokenBalance);