Function ruma::serde::duration::opt_ms::deserialize

pub fn deserialize<'de, D>(
    deserializer: D
) -> Result<Option<Duration>, <D as Deserializer<'de>>::Error> where
    D: Deserializer<'de>, 

Deserializes an Option.

Will fail if integer is greater than the maximum integer that can be unambiguously represented by an f64.