futures = { version = "0.3" }
tokio = { version = "1.0", features = [ "io-util", "net", "time" ], optional = true }
serde = { version = "1.0", features = ["derive"], optional = true }
futures = { version = "0.3" }
tokio = { version = "1.0", features = [ "io-util", "net", "time" ], optional = true }
serde = { version = "1.0", features = ["derive"], optional = true }