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: _explanation.rs
    path of file: ./repos/aws-sdk-rust/sdk/ec2/src/types
    
    the code of the file until where you have to start completion: // Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.

/// <p>Describes an explanation code for an unreachable path. For more information, see <a href="https://docs.aws.amazon.com/vpc/latest/reachability/explanation-codes.html">Reachability Analyzer explanation codes</a>.</p>
#[non_exhaustive]
#[derive(::std::clone::Clone, ::std::cmp::PartialEq, ::std::fmt::Debug)]
pub struct Explanation {
    /// <p>The network ACL.</p>
    pub acl: ::std::option::Option<crate::types::AnalysisComponent>,
    /// <p>The network ACL rule.</p>
    pub acl_rule: ::std::option::Option<crate::types::AnalysisAclRule>,
    /// <p>The IPv4 address, in CIDR notation.</p>
    pub address: ::std::option::Option<::std::string::String>,
    /// <p>The IPv4 addresses, in CIDR notation.</p>
    pub addresses: ::std::option::Option<::std::vec::Vec<::std::string::String>>,
    /// <p>The resource to which the component is attached.</p>
    pub attached_to: ::std::option::Option<crate::types::AnalysisComponent>,
    /// <p>The Availability Zones.</p>
    pub availability_zones: ::std::option::Option<::std::vec::Vec<::std::string::String>>,
    /// <p>The CIDR ranges.</p>
    pub cidrs: ::std::option::Option<::std::vec::Vec<::std::string::String>>,
    /// <p>The component.</p>
    pub component: ::std::option::Option<crate::types::AnalysisComponent>,
    /// <p>The customer gateway.</p>
    pub customer_gateway: ::std::option::Option<crate::types::AnalysisComponent>,
    /// <p>The destination.</p>
    pub destination: ::std::option::Option<crate::types::AnalysisComponent>,
    /// <p>The destination VPC.</p>
    pub destination_vpc: ::std::option::Option<crate::types::AnalysisComponent>,
    /// <p>The direction. The following are the possible values:</p>
    /// <ul>
    /// <li>
    /// <p>egress</p></li>
    /// <li>
    /// <p>ingress</p></li>
    /// </ul>
    pub direction: ::std::option::Option<::std::string::String>,
    /// <p>The explanation code.</p>
    pub explanation_code: ::std::option::Option<::std::string::String>,
    //
    
    pub fn build(self) -> crate::types::Explanation {
        crate::types::Explanation {
            acl: self.acl,
            acl_rule: self.acl_rule,
            address: self.address,
            addresses: self.addresses,
            attached_to: self.attached_to,
            availability_zones: self.availability_zones,
            cidrs: self.cidrs,
            component: self.component,
            customer_gateway: self.customer_gateway,
            destination: self.destination,
            destination_vpc: self.destination_vpc,
            direction: self.direction,
            explanation_code: self.explanation_code,
            ingress_route_table: self.ingress_route_table,
            internet_gateway: self.internet_gateway,
            load_balancer_arn: self.load_balancer_arn,
            classic_load_balancer_listener: self.classic_load_balancer_listener,
            load_balancer_listener_port: self.load_balancer_listener_port,
            load_balancer_target: self.load_balancer_target,
            load_balancer_target_group: self.load_balancer_target_group,
            load_balancer_target_groups: self.load_balancer_target_groups,
            load_balancer_target_port: self.load_balancer_target_port,
            elastic_load_balancer_listener: self.elastic_load_balancer_listener,
            missing_component: self.missing_component,
            nat_gateway: self.nat_gateway,
            network_interface: self.network_interface,
            packet_field: self.packet_field,
            vpc_peering_connection: self.vpc_peering_connection,
            port: self.port,
            port_ranges: self.port_ranges,
            prefix_list: self.prefix_list,
            protocols: self.protocols,
            route_table_route: self.route_table_route,
            route_table: self.route_table,
            security_group: self.security_group,
            security_group_rule: self.security_group_rule,
            security_groups: self.security_groups,
            source_vpc: self.source_vpc,
            state: self.state,
            subnet: self.subnet,
            subnet_route_table: self.subnet_route_table,
            vpc: self.vpc,
            vpc_endpoint: self.vpc_endpoint,
            vpn_connection: self.vpn_connection,
            vpn_gateway: self.vpn_gateway,
            transit_gateway: self.transit_gateway,
            transit_gateway_route_table: self.transit_gateway_route_table,
            transit_gateway_route_table_route: self.transit_gateway_route_table_route,
            transit_gateway_attachment: self.transit_gateway_attachment,
            component_account: self.component_account,
            component_region: self.component_region,
            firewall_stateless_rule: self.firewall_stateless_rule,
            firewall_stateful_rule: self.firewall_stateful_rule,
        }
    }