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: lib.rs
    path of file: ./repos/leptos/meta/src
    
    the code of the file until where you have to start completion: #![deny(missing_docs)]
#![forbid(unsafe_code)]

//! # Leptos Meta
//!
//! Leptos Meta a
    
pub fn use_head() -> MetaContext {
    #[cfg(debug_assertions)]
    feature_warning();

    match use_context::<MetaContext>() {
        None => {
            debug_warn!(
                "use_head() is being called without a MetaContext being \
                 provided. We'll automatically create and provide one, but if \
                 this is being called in a child route it may cause bugs. To \
                 be safe, you should provide_meta_context() somewhere in the \
                 root of the app."
            );
            let meta = MetaContext::new();
            provide_context(meta.clone());
            meta
        }
        Some(ctx) => ctx,
    }
}