Method length_opt

crates/vm/src/protocol/sequence.rs:142–144

(self, vm: &VirtualMachine)

    }

    pub fn length_opt(self, vm: &VirtualMachine) -> Option<PyResult<usize>> {
        self.slots().length.load().map(|f| f(self, vm))
    }

    pub fn length(self, vm: &VirtualMachine) -> PyResult<usize> {
        self.length_opt(vm).ok_or_else(|| {