Function solana_cli::cluster_query::process_ping

pub fn process_ping(
    rpc_client: &RpcClient, 
    config: &CliConfig<'_>, 
    lamports: u64, 
    interval: &Duration, 
    count: &Option<u64>, 
    timeout: &Duration, 
    fixed_blockhash: &Option<Hash>, 
    print_timestamp: bool
) -> ProcessResult