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use chrono_tz::Tz; use crate::{InputValueError, InputValueResult, Scalar, ScalarType, Value}; #[Scalar(internal, name = "TimeZone")] impl ScalarType for Tz { fn parse(value: Value) -> InputValueResult<Self> { match value { Value::String(s) => Ok(s.parse()?), _ => Err(InputValueError::expected_type(value)), } } fn to_value(&self) -> Value { Value::String(self.name().to_owned()) } }