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: agent_config.rs
    path of file: ./repos/webrtc/ice/src/agent
    
    the code of the file until where you have to start completion: use std::net::IpAddr;
use std::time::Duration;

use util::vnet::net::*;

use super::*;
use crate::error::*;
use crate::mdns::*;
use crate::network_type::*;
use crate::udp_network::UDPNetwork;
use crate::url::*;

/// The interval at which the agent performs candidate checks in the connecting phase.
pub(crate) const DEFAULT_CHECK_INTERVAL: Duration = Duration::from_millis(200);

/// The interval used to keep candidates alive.
pub(crate) const DEFAULT_KEEPALIVE_INTERVAL: Duration = Duration::from_secs(2);

/// The default time till
    
    pub(crate) fn init_with_defaults(&self, a: &mut AgentInternal) {
        if let Some(max_binding_requests) = self.max_binding_requests {
            a.max_binding_requests = max_binding_requests;
        } else {
            a.max_binding_requests = DEFAULT_MAX_BINDING_REQUESTS;
        }

        if let Some(host_acceptance_min_wait) = self.host_acceptance_min_wait {
            a.host_acceptance_min_wait = host_acceptance_min_wait;
        } else {
            a.host_acceptance_min_wait = DEFAULT_HOST_ACCEPTANCE_MIN_WAIT;
        }

        if let Some(srflx_acceptance_min_wait) = self.srflx_acceptance_min_wait {
            a.srflx_acceptance_min_wait = srflx_acceptance_min_wait;
        } else {
            a.srflx_acceptance_min_wait = DEFAULT_SRFLX_ACCEPTANCE_MIN_WAIT;
        }

        if let Some(prflx_acceptance_min_wait) = self.prflx_acceptance_min_wait {
            a.prflx_acceptance_min_wait = prflx_acceptance_min_wait;
        } else {
            a.prflx_acceptance_min_wait = DEFAULT_PRFLX_ACCEPTANCE_MIN_WAIT;
        }

        if let Some(relay_acceptance_min_wait) = self.relay_acceptance_min_wait {
            a.relay_acceptance_min_wait = relay_acceptance_min_wait;
        } else {
            a.relay_acceptance_min_wait = DEFAULT_RELAY_ACCEPTANCE_MIN_WAIT;
        }

        if let Some(disconnected_timeout) = self.disconnected_timeout {
            a.disconnected_timeout = disconnected_timeout;
        } else {
            a.disconnected_timeout = DEFAULT_DISCONNECTED_TIMEOUT;
        }

        if let Some(failed_timeout) = self.failed_timeout {
            a.failed_timeout = failed_timeout;
        } else {
            a.failed_timeout = DEFAULT_FAILED_TIMEOUT;
        }

        if let Some(keepalive_interval) = self.keepalive_interval {
            a.keepalive_interval = keepalive_interval;
        } else {
            a.keepalive_interval = DEFAULT_KEEPALIVE_INTERVAL;
        }

        if self.check_interval == Duration::from_secs(0) {
            a.check_interval = DEFAULT_CHECK_INTERVAL;
        } else {
            a.check_interval = self.check_interval;
        }
    }