Function validate_with_source 

pub fn validate_with_source(
    doc: &AdfDocument,
    source: Option<&str>,
) -> Result<(), AdfValidationError>

Like validate, but source-aware.

Keeps source (the JFM markdown doc was converted from, when applicable) so any violation is reported with the offending run’s 1-based line:column. Pass None when there is no JFM source (e.g. ADF-format input). See issue #1087.

Errors

Returns AdfValidationError when the document violates one or more allowed-children rules in the upstream content model.