You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: interpreter.rs
    path of file: ./repos/chiselstrike/server/src/policy
    
    the code of the file until where you have to start completion: use boa_engine::JsValue;
use chiselc::policies::{Environment, LogicOp, Predicate, Var, VarId};
use
    
    fn get_value(&self, env: &Environment, var: &Var) -> Option<&JsonValue> {
        match var {
            Var::Ident(ref s) if self.name == s => Some(self.value),
            Var::Member(obj, prop) => {
                let obj = env.get(*obj);
                let value = self.get_value(env, obj)?;
                // return null so we don't mistake that for an impossiblity to evaluate:
                // we could go down the property chain, but then found nothing.
                value.get(prop).or(Some(&JsonValue::Null))
            }
            _ => None,
        }
    }