You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: xml.rs
    path of file: ./repos/cyclonedx-rust-cargo/cyclonedx-bom/src
    
    the code of the file until where you have to start completion: use crate::errors::{XmlReadError, XmlWriteError};
use std::io::{Read, Write};
use xml::{
    attribute::OwnedAttribute,
    name::OwnedName,
    namespace::{Namespace, NS_NO_PREFIX},
    reader::{self},
    writer::{self, EventWriter, XmlEvent},
    EventReader,
};

pub(crate) trait ToXmlDocument {
    fn write_xml_document<W: Write>(
        &self,
        writer: &mut EventWriter<W>,
    ) -> Result<(), XmlWriteError>;
}

pub(crate) trait ToXml {
    fn write_xml_element<W: Write>(&self, writer: &mut EventWriter<W>)
        -> Result<(), XmlWriteError>;

    fn will_write(&self) -> bool {
        true
    }
}

pub(crate) trait ToInnerXml {
    fn write_xml_named_element<W: Write>(
        &self,
        writer: &mut EventWriter<W>,
        tag: &str,
    ) -> Result<(), XmlWriteError>;

    fn will_write(&self) -> bool {
        true
    }
}

/// Write a tag that is of the form `<tag>content</tag>`
pub(crate) fn write_simple_tag<W: Write>(
    writ
    
    pub(crate) fn read_element_from_string<X: FromXml>(string: impl AsRef<str>) -> X {
        let mut event_reader =
            EventReader::new_with_config(string.as_ref().as_bytes(), parser_config());

        let start_document = event_reader.next().expect("Expected to start the document");

        match start_document {
            reader::XmlEvent::StartDocument { .. } => (),
            other => panic!("Expected to start a document, but got {:?}", other),
        }

        let initial_event = event_reader
            .next()
            .expect("Failed to read from the XML input");
        let output = match initial_event {
            reader::XmlEvent::StartElement {
                name, attributes, ..
            } => X::read_xml_element(&mut event_reader, &name, &attributes)
                .expect("Failed to read the element from the string"),
            other => panic!("Expected to start an element, but got {:?}", other),
        };
        let end_document = event_reader.next().expect("Expected to end the document");

        match end_document {
            reader::XmlEvent::EndDocument { .. } => (),
            other => panic!("Expected to end a document, but got {:?}", other),
        }

        output
    }