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: _firewall_policy_response.rs
    path of file: ./repos/aws-sdk-rust/sdk/networkfirewall/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>The high-level properties of a firewall policy. This, along with the <code>FirewallPolicy</code>, define the policy. You can retrieve all objects for a firewall policy by calling <code>DescribeFirewallPolicy</code>.</p>
#[non_exhaustive]
#[derive(::std::clone::Clone, ::std::cmp::PartialEq, ::std::fmt::Debug)]
pub struct FirewallPolicyResponse {
    /// <p>The descriptive name of the firewall policy. You can't change the name of a firewall policy after you create it.</p>
    pub firewall_policy_name: ::std::string::String,
    /// <p>The Amazon Resource Name (ARN) of the firewall policy.</p><note>
    /// <p>If this response is for a create request that had <code>DryRun</code> set to <code>TRUE</code>, then this ARN is a placeholder that isn't attached to a valid resource.</p>
    /// </note>
    pub firewall_policy_arn: ::std::string::String,
    /// <p>The unique identifier for the fi
    
    pub fn build(self) -> ::std::result::Result<crate::types::FirewallPolicyResponse, ::aws_smithy_types::error::operation::BuildError> {
        ::std::result::Result::Ok(crate::types::FirewallPolicyResponse {
            firewall_policy_name: self.firewall_policy_name.ok_or_else(|| {
                ::aws_smithy_types::error::operation::BuildError::missing_field(
                    "firewall_policy_name",
                    "firewall_policy_name was not specified but it is required when building FirewallPolicyResponse",
                )
            })?,
            firewall_policy_arn: self.firewall_policy_arn.ok_or_else(|| {
                ::aws_smithy_types::error::operation::BuildError::missing_field(
                    "firewall_policy_arn",
                    "firewall_policy_arn was not specified but it is required when building FirewallPolicyResponse",
                )
            })?,
            firewall_policy_id: self.firewall_policy_id.ok_or_else(|| {
                ::aws_smithy_types::error::operation::BuildError::missing_field(
                    "firewall_policy_id",
                    "firewall_policy_id was not specified but it is required when building FirewallPolicyResponse",
                )
            })?,
            description: self.description,
            firewall_policy_status: self.firewall_policy_status,
            tags: self.tags,
            consumed_stateless_rule_capacity: self.consumed_stateless_rule_capacity,
            consumed_stateful_rule_capacity: self.consumed_stateful_rule_capacity,
            number_of_associations: self.number_of_associations,
            encryption_configuration: self.encryption_configuration,
            last_modified_time: self.last_modified_time,
        })
    }