pub fn write_to_string(&self, dst: &mut String) -> Result<(), toml::ser::Error> {
        let mut serializer = Serializer::pretty(dst);
        serializer.pretty_array(false);
        self.serialize(&mut serializer)
    }
Writes out the contents of this summary as TOML to the given string.

Returns an error if writing out the TOML was unsuccessful.
tools/hakari/src/summaries.rs