async fn update_pull_request_approval_rule_content(
        &self,
        input: UpdatePullRequestApprovalRuleContentInput,
    ) -> Result<
        UpdatePullRequestApprovalRuleContentOutput,
        RusotoError<UpdatePullRequestApprovalRuleContentError>,
    > {
        let mut request = self.new_signed_request("POST", "/");
        request.add_header(
            "x-amz-target",
            "CodeCommit_20150413.UpdatePullRequestApprovalRuleContent",
        );
        let encoded = serde_json::to_string(&input).unwrap();
        request.set_payload(Some(encoded));

        let response = self
            .sign_and_dispatch(
                request,
                UpdatePullRequestApprovalRuleContentError::from_response,
            )
            .await?;
        let mut response = response;
        let response = response.buffer().await.map_err(RusotoError::HttpDispatch)?;
        proto::json::ResponsePayload::new(&response)
            .deserialize::<UpdatePullRequestApprovalRuleContentOutput, _>()
    }
<p>Updates the structure of an approval rule created specifically for a pull request. For example, you can change the number of required approvers and the approval pool for approvers. </p>
rusoto/services/codecommit/src/generated.rs