> For the complete documentation index, see [llms.txt](https://docs.r.xyz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.r.xyz/glider-ide/api/argument/argument.backward_df.md).

# Argument.backward\_df()

`backward_df() → List[Point]`

As Argument has no intraprocedural backward dataflow, this function solely exists to comply with the glider architecture, but if used will return an empty list

```python
from glider import *
def query():
    func = Contracts().non_interface_contracts().functions().with_arg_count(1).exec(1)[0]
    for ins in func.arguments().list()[0].backward_df():
        print(ins.source_code())
    return [func]
```

```json
"root":{3 items
"contract":string"0xd705c24267ed3c55458160104994c55c6492dfcf"
"contract_name":string"Token"
"sol_function":solidity
function balanceOf(address account) public view override returns (uint256) {
        return _balances[account];
    }
}
```