Function to_writer 

pub fn to_writer<W, T>(writer: W, value: &T) -> Result<()>
where
    W: Write,
    T: ?Sized + Serialize,

Serialize a Rust value to YAML and write to a std::io::Write sink.

Internally serialises to a String then writes the bytes to writer in a single call.

Errors

• Error::Io — the underlying writer returned an I/O error.
• All variants documented on to_string.