Method prefix

backend/src/types.rs:446–452

(&self)

    }

    pub fn prefix(&self) -> Option<String> {
        match self {
            Self::None(_) => None,
            Self::StartYear(ts) => Some(ts.display_string("%Y")),
            Self::StartYearMonth(ts) => Some(ts.display_string("%Y-%m")),
        }
    }

    pub fn format(&self, name: &str) -> String {
        match self.prefix() {