async fn create_layer(
        &self,
        input: CreateLayerRequest,
    ) -> Result<CreateLayerResult, RusotoError<CreateLayerError>> {
        let mut request = self.new_signed_request("POST", "/");
        request.add_header("x-amz-target", "OpsWorks_20130218.CreateLayer");
        let encoded = serde_json::to_string(&input).unwrap();
        request.set_payload(Some(encoded));

        let response = self
            .sign_and_dispatch(request, CreateLayerError::from_response)
            .await?;
        let mut response = response;
        let response = response.buffer().await.map_err(RusotoError::HttpDispatch)?;
        proto::json::ResponsePayload::new(&response).deserialize::<CreateLayerResult, _>()
    }
<p>Creates a layer. For more information, see <a href="https://docs.aws.amazon.com/opsworks/latest/userguide/workinglayers-basics-create.html">How to Create a Layer</a>.</p> <note> <p>You should use <b>CreateLayer</b> for noncustom layer types such as PHP App Server only if the stack does not have an existing layer of that type. A stack can have at most one instance of each noncustom layer; if you attempt to create a second instance, <b>CreateLayer</b> fails. A stack can have an arbitrary number of custom layers, so you can call <b>CreateLayer</b> as many times as you like for that layer type.</p> </note> <p> <b>Required Permissions</b>: To use this action, an IAM user must have a Manage permissions level for the stack, or an attached policy that explicitly grants permissions. For more information on user permissions, see <a href="https://docs.aws.amazon.com/opsworks/latest/userguide/opsworks-security-users.html">Managing User Permissions</a>.</p>
rusoto/services/opsworks/src/generated.rs