tecywiz121 a0d907cf27 Support nullable fields in the Rust generator (#2353)
* Use Option for nullable fields in Rust (closes #2337)

* Update Rust's petstore
2019-03-12 09:20:54 +08:00
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2018-03-13 14:41:23 +08:00
2019-03-06 17:22:12 +08:00