Function to_writer_multi_with_config 

pub fn to_writer_multi_with_config<W, T>(
    writer: W,
    values: &[T],
    config: &SerializerConfig,
) -> Result<()>
where
    W: Write,
    T: Serialize,

Serialize multiple values as multi-document YAML to a writer with custom configuration.

Errors

Returns an error if any value cannot be serialized or writing fails.