// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.
impl super::Client {
    /// Constructs a fluent builder for the [`ListSubscriptionDefinitionVersions`](crate::operation::list_subscription_definition_versions::builders::ListSubscriptionDefinitionVersionsFluentBuilder) operation.
    ///
    /// - The fluent builder is configurable:
    ///   - [`max_results(impl Into<String>)`](crate::operation::list_subscription_definition_versions::builders::ListSubscriptionDefinitionVersionsFluentBuilder::max_results) / [`set_max_results(Option<String>)`](crate::operation::list_subscription_definition_versions::builders::ListSubscriptionDefinitionVersionsFluentBuilder::set_max_results):<br>required: **false**<br>The maximum number of results to be returned per request.<br>
    ///   - [`next_token(impl Into<String>)`](crate::operation::list_subscription_definition_versions::builders::ListSubscriptionDefinitionVersionsFluentBuilder::next_token) / [`set_next_token(Option<String>)`](crate::operation::list_subscription_definition_versions::builders::ListSubscriptionDefinitionVersionsFluentBuilder::set_next_token):<br>required: **false**<br>The token for the next set of results, or ''null'' if there are no additional results.<br>
    ///   - [`subscription_definition_id(impl Into<String>)`](crate::operation::list_subscription_definition_versions::builders::ListSubscriptionDefinitionVersionsFluentBuilder::subscription_definition_id) / [`set_subscription_definition_id(Option<String>)`](crate::operation::list_subscription_definition_versions::builders::ListSubscriptionDefinitionVersionsFluentBuilder::set_subscription_definition_id):<br>required: **true**<br>The ID of the subscription definition.<br>
    /// - On success, responds with [`ListSubscriptionDefinitionVersionsOutput`](crate::operation::list_subscription_definition_versions::ListSubscriptionDefinitionVersionsOutput) with field(s):
    ///   - [`next_token(Option<String>)`](crate::operation::list_subscription_definition_versions::ListSubscriptionDefinitionVersionsOutput::next_token): The token for the next set of results, or ''null'' if there are no additional results.
    ///   - [`versions(Option<Vec::<VersionInformation>>)`](crate::operation::list_subscription_definition_versions::ListSubscriptionDefinitionVersionsOutput::versions): Information about a version.
    /// - On failure, responds with [`SdkError<ListSubscriptionDefinitionVersionsError>`](crate::operation::list_subscription_definition_versions::ListSubscriptionDefinitionVersionsError)
    pub fn list_subscription_definition_versions(
        &self,
    ) -> crate::operation::list_subscription_definition_versions::builders::ListSubscriptionDefinitionVersionsFluentBuilder {
        crate::operation::list_subscription_definition_versions::builders::ListSubscriptionDefinitionVersionsFluentBuilder::new(self.handle.clone())
    }
}