pub fn add_rust(
        &mut self,
        origin: ContentOrigin,
        content: &str,
        doc_comments: bool,
        dev_comments: bool,
    ) -> Result<()> {
        let cluster = Clusters::load_from_str(content, doc_comments, dev_comments)?;

        let chunks = Vec::<CheckableChunk>::from(cluster);
        self.add_inner(origin, chunks);
        Ok(())
    }
Adds a rust content str to the documentation.
doc-chunks/src/lib.rs