// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.
impl super::Client {
    /// Constructs a fluent builder for the [`GetTopicAttributes`](crate::operation::get_topic_attributes::builders::GetTopicAttributesFluentBuilder) operation.
    ///
    /// - The fluent builder is configurable:
    ///   - [`topic_arn(impl Into<String>)`](crate::operation::get_topic_attributes::builders::GetTopicAttributesFluentBuilder::topic_arn) / [`set_topic_arn(Option<String>)`](crate::operation::get_topic_attributes::builders::GetTopicAttributesFluentBuilder::set_topic_arn):<br>required: **true**<br><p>The ARN of the topic whose properties you want to get.</p><br>
    /// - On success, responds with [`GetTopicAttributesOutput`](crate::operation::get_topic_attributes::GetTopicAttributesOutput) with field(s):
    ///   - [`attributes(Option<HashMap::<String, String>>)`](crate::operation::get_topic_attributes::GetTopicAttributesOutput::attributes): <p>A map of the topic's attributes. Attributes in this map include the following:</p> <ul>  <li>   <p><code>DeliveryPolicy</code> – The JSON serialization of the topic's delivery policy.</p></li>  <li>   <p><code>DisplayName</code> – The human-readable name used in the <code>From</code> field for notifications to <code>email</code> and <code>email-json</code> endpoints.</p></li>  <li>   <p><code>EffectiveDeliveryPolicy</code> – The JSON serialization of the effective delivery policy, taking system defaults into account.</p></li>  <li>   <p><code>Owner</code> – The Amazon Web Services account ID of the topic's owner.</p></li>  <li>   <p><code>Policy</code> – The JSON serialization of the topic's access control policy.</p></li>  <li>   <p><code>SignatureVersion</code> – The signature version corresponds to the hashing algorithm used while creating the signature of the notifications, subscription confirmations, or unsubscribe confirmation messages sent by Amazon SNS.</p>   <ul>    <li>     <p>By default, <code>SignatureVersion</code> is set to <b>1</b>. The signature is a Base64-encoded <b>SHA1withRSA</b> signature.</p></li>    <li>     <p>When you set <code>SignatureVersion</code> to <b>2</b>. Amazon SNS uses a Base64-encoded <b>SHA256withRSA</b> signature.</p><note>      <p>If the API response does not include the <code>SignatureVersion</code> attribute, it means that the <code>SignatureVersion</code> for the topic has value <b>1</b>.</p>     </note></li>   </ul></li>  <li>   <p><code>SubscriptionsConfirmed</code> – The number of confirmed subscriptions for the topic.</p></li>  <li>   <p><code>SubscriptionsDeleted</code> – The number of deleted subscriptions for the topic.</p></li>  <li>   <p><code>SubscriptionsPending</code> – The number of subscriptions pending confirmation for the topic.</p></li>  <li>   <p><code>TopicArn</code> – The topic's ARN.</p></li>  <li>   <p><code>TracingConfig</code> – Tracing mode of an Amazon SNS topic. By default <code>TracingConfig</code> is set to <code>PassThrough</code>, and the topic passes through the tracing header it receives from an Amazon SNS publisher to its subscriptions. If set to <code>Active</code>, Amazon SNS will vend X-Ray segment data to topic owner account if the sampled flag in the tracing header is true. This is only supported on standard topics.</p></li> </ul> <p>The following attribute applies only to <a href="https://docs.aws.amazon.com/sns/latest/dg/sns-server-side-encryption.html">server-side-encryption</a>:</p> <ul>  <li>   <p><code>KmsMasterKeyId</code> - The ID of an Amazon Web Services managed customer master key (CMK) for Amazon SNS or a custom CMK. For more information, see <a href="https://docs.aws.amazon.com/sns/latest/dg/sns-server-side-encryption.html#sse-key-terms">Key Terms</a>. For more examples, see <a href="https://docs.aws.amazon.com/kms/latest/APIReference/API_DescribeKey.html#API_DescribeKey_RequestParameters">KeyId</a> in the <i>Key Management Service API Reference</i>.</p></li> </ul> <p>The following attributes apply only to <a href="https://docs.aws.amazon.com/sns/latest/dg/sns-fifo-topics.html">FIFO topics</a>:</p> <ul>  <li>   <p><code>FifoTopic</code> – When this is set to <code>true</code>, a FIFO topic is created.</p></li>  <li>   <p><code>ContentBasedDeduplication</code> – Enables content-based deduplication for FIFO topics.</p>   <ul>    <li>     <p>By default, <code>ContentBasedDeduplication</code> is set to <code>false</code>. If you create a FIFO topic and this attribute is <code>false</code>, you must specify a value for the <code>MessageDeduplicationId</code> parameter for the <a href="https://docs.aws.amazon.com/sns/latest/api/API_Publish.html">Publish</a> action.</p></li>    <li>     <p>When you set <code>ContentBasedDeduplication</code> to <code>true</code>, Amazon SNS uses a SHA-256 hash to generate the <code>MessageDeduplicationId</code> using the body of the message (but not the attributes of the message).</p>     <p>(Optional) To override the generated value, you can specify a value for the <code>MessageDeduplicationId</code> parameter for the <code>Publish</code> action.</p></li>   </ul></li> </ul>
    /// - On failure, responds with [`SdkError<GetTopicAttributesError>`](crate::operation::get_topic_attributes::GetTopicAttributesError)
    pub fn get_topic_attributes(&self) -> crate::operation::get_topic_attributes::builders::GetTopicAttributesFluentBuilder {
        crate::operation::get_topic_attributes::builders::GetTopicAttributesFluentBuilder::new(self.handle.clone())
    }
}