Function solana_runtime::loader_utils::upgrade_program

pub fn upgrade_program<T: Client>(
    bank_client: &T, 
    from_keypair: &Keypair, 
    program_pubkey: &Pubkey, 
    buffer_pubkey: &Pubkey, 
    authority_keypair: &Keypair, 
    spill_pubkey: &Pubkey
)