async fn describe_instance_information(
        &self,
        input: DescribeInstanceInformationRequest,
    ) -> Result<DescribeInstanceInformationResult, RusotoError<DescribeInstanceInformationError>>
    {
        let mut request = self.new_signed_request("POST", "/");
        request.add_header("x-amz-target", "AmazonSSM.DescribeInstanceInformation");
        let encoded = serde_json::to_string(&input).unwrap();
        request.set_payload(Some(encoded));

        let response = self
            .sign_and_dispatch(request, DescribeInstanceInformationError::from_response)
            .await?;
        let mut response = response;
        let response = response.buffer().await.map_err(RusotoError::HttpDispatch)?;
        proto::json::ResponsePayload::new(&response)
            .deserialize::<DescribeInstanceInformationResult, _>()
    }
<p><p>Describes one or more of your instances, including information about the operating system platform, the version of SSM Agent installed on the instance, instance status, and so on.</p> <p>If you specify one or more instance IDs, it returns information for those instances. If you do not specify instance IDs, it returns information for all your instances. If you specify an instance ID that is not valid or an instance that you do not own, you receive an error.</p> <note> <p>The IamRole field for this API action is the Amazon Identity and Access Management (IAM) role assigned to on-premises instances. This call does not return the IAM role for EC2 instances.</p> </note></p>
rusoto/services/ssm/src/generated.rs