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: decryption.rs
    path of file: ./repos/solana/zk-token-sdk/src/zk_token_elgamal
    
    the code of the file until where you have to start completion: #[cfg(not(target_os = "solana"))]
use crate::{
    encryption::elgamal::{ElGamalCiphertext, ElGamalSecretKey},
    zk_token_elgamal::pod,
};

#[cfg(not(target_os = "solana"))]
impl pod::ElGamalCiphertext {
    pub fn decrypt(self, secret_key: &ElGamalSecretKey) -> Op
    
    pub fn decrypt(self, secret_key: &ElGamalSecretKey) -> Option<u64> {
        let deserialized_ciphertext: Option<ElGamalCiphertext> = self.try_into().ok();
        if let Some(ciphertext) = deserialized_ciphertext {
            ciphertext.decrypt_u32(secret_key)
        } else {
            None
        }
    }