Function verifier_index_from_bytes 

pub fn verifier_index_from_bytes(
    bytes: &[u8],
) -> Result<VerifierIndex<mina_tree::::proofs::VerifierIndex::{constant#0}, <Fp<MontBackend<FrConfig, 4>, 4> as FieldWitness>::OtherCurve, SRS<<Fp<MontBackend<FrConfig, 4>, 4> as FieldWitness>::OtherCurve>>, VerifierIndexFromBytesError>