identifiers: Fix unused import without serde feature
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@ -13,6 +13,7 @@
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#[cfg(feature = "serde")]
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#[cfg(feature = "serde")]
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extern crate serde1 as serde;
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extern crate serde1 as serde;
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#[cfg(feature = "serde")]
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use std::convert::TryFrom;
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use std::convert::TryFrom;
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#[cfg(feature = "serde")]
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#[cfg(feature = "serde")]
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