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#[cfg(all(feature = "hyper13", feature = "hyper14"))]
compile_error!("feature `hyper13` and `hyper14` are mutably exclusive");
#[cfg(not(any(feature = "hyper13", feature = "hyper14")))]
compile_error!("feature `hyper13` or `hyper14` must be enabled for this crate");
#[cfg(all(feature = "hyper13", not(feature = "hyper14")))]
extern crate hyper13 as hyper;
#[cfg(all(feature = "hyper14", not(feature = "hyper13")))]
extern crate hyper14 as hyper;