Function embedded_error_chain::format_chained

pub fn format_chained<C: ErrorCategory>(
    error_code: ErrorCode, 
    next_formatter: Option<u8>, 
    f: Option<&mut Formatter<'_>>
) -> (ErrorCategoryHandle, Result<Option<ErrorCodeFormatterVal>, Error>)

Debug format the given error_code using f (if f is Some), get the ErrorCategoryHandle of the type parameter C, and get the next ErrorCodeFormatter if next_formatter is Some.