Function thin_air_read_runtime_var

pub fn thin_air_read_runtime_var<T>(backing_var: String) -> ReadVar<T>
where
    T: Serialize + DeserializeOwned,

DANGER: obtain a handle to a ReadVar “out of thin air”.

This should NEVER be used from within a flowey node. This is a sharp tool, and should only be used by code implementing flow / pipeline resolution logic.