#[cfg(feature = "futures")]
pub(crate) mod futures;
#[cfg(feature = "futures01")]
pub(crate) mod futures01;
#[cfg(feature = "proc_macro")]
pub(crate) mod proc_macro;
#[cfg(feature = "rayon")]
pub(crate) mod rayon;
#[cfg(feature = "serde")]
pub(crate) mod serde;