Function solana_vote_program::vote_state::process_vote_state_update

pub fn process_vote_state_update<S: BuildHasher>(
    invoke_context: &InvokeContext<'_>, 
    instruction_context: &InstructionContext, 
    signers: &HashSet<Pubkey, S>, 
    vote_account_index: usize, 
    vote_state_update: VoteStateUpdate
) -> Result<(), InstructionError>