aws-ec2-transitgatewaymulticastgroupmember/src/main/java/software/amazon/ec2/transitgatewaymulticastgroupmember/workflow/delete/DeletePrecheck.java [11:66]:
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public class DeletePrecheck {
    AmazonWebServicesClientProxy proxy;
    ResourceHandlerRequest<ResourceModel> request;
    CallbackContext callbackContext;
    ProxyClient<Ec2Client> client;
    Logger logger;
    ProgressEvent<ResourceModel, CallbackContext>  progress;
    ResourceModel model;

    public DeletePrecheck(
        AmazonWebServicesClientProxy proxy,
        ResourceHandlerRequest<ResourceModel> request,
        CallbackContext callbackContext,
        ProxyClient<Ec2Client> client,
        Logger logger
    ) {
        this.model = request.getDesiredResourceState();
        this.proxy = proxy;
        this.request = request;
        this.callbackContext = callbackContext;
        this.client = client;
        this.logger = logger;
    }

    public ProgressEvent<ResourceModel, CallbackContext>  run(ProgressEvent<ResourceModel, CallbackContext> progress) {
        if(this.callbackContext.getAttempts() > 0) { return progress; } //skip if this not the first attempt by the lambda function

        try {
            this.progress = progress;
            return this.validate();
        } catch (Exception exception) {
            return this.handleError(exception);
        }

    }

    protected ProgressEvent<ResourceModel, CallbackContext> validate() {
        ResourceModel current = this.makeRequest();
        if(current == null) {
            return this.failure();
        } else {
            return this.progress;
        }
    }

    protected ProgressEvent<ResourceModel, CallbackContext> failure() {
        CfnResourceConflictException exception =  new CfnResourceConflictException(ResourceModel.TYPE_NAME, model.getPrimaryIdentifier().toString().replace("/properties/", ""), "Cannot be modified by ACTION: DELETE");
        return ProgressEvent.defaultFailureHandler(exception, HandlerErrorCode.NotFound);
    }

    private ResourceModel makeRequest() {
        return new Read(this.proxy, this.request, this.callbackContext, this.client, this.logger).simpleRequest(this.model);
    }

    protected ProgressEvent<ResourceModel, CallbackContext>  handleError(Exception exception) {
        return ProgressEvent.defaultFailureHandler(exception, ExceptionMapper.mapToHandlerErrorCode(exception));
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aws-ec2-transitgatewaymulticastgroupsource/src/main/java/software/amazon/ec2/transitgatewaymulticastgroupsource/workflow/delete/DeletePrecheck.java [11:66]:
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public class DeletePrecheck {
    AmazonWebServicesClientProxy proxy;
    ResourceHandlerRequest<ResourceModel> request;
    CallbackContext callbackContext;
    ProxyClient<Ec2Client> client;
    Logger logger;
    ProgressEvent<ResourceModel, CallbackContext>  progress;
    ResourceModel model;

    public DeletePrecheck(
        AmazonWebServicesClientProxy proxy,
        ResourceHandlerRequest<ResourceModel> request,
        CallbackContext callbackContext,
        ProxyClient<Ec2Client> client,
        Logger logger
    ) {
        this.model = request.getDesiredResourceState();
        this.proxy = proxy;
        this.request = request;
        this.callbackContext = callbackContext;
        this.client = client;
        this.logger = logger;
    }

    public ProgressEvent<ResourceModel, CallbackContext>  run(ProgressEvent<ResourceModel, CallbackContext> progress) {
        if(this.callbackContext.getAttempts() > 0) { return progress; } //skip if this not the first attempt by the lambda function

        try {
            this.progress = progress;
            return this.validate();
        } catch (Exception exception) {
            return this.handleError(exception);
        }

    }

    protected ProgressEvent<ResourceModel, CallbackContext> validate() {
        ResourceModel current = this.makeRequest();
        if(current == null) {
            return this.failure();
        } else {
            return this.progress;
        }
    }

    protected ProgressEvent<ResourceModel, CallbackContext> failure() {
        CfnResourceConflictException exception =  new CfnResourceConflictException(ResourceModel.TYPE_NAME, model.getPrimaryIdentifier().toString().replace("/properties/", ""), "Cannot be modified by ACTION: DELETE");
        return ProgressEvent.defaultFailureHandler(exception, HandlerErrorCode.NotFound);
    }

    private ResourceModel makeRequest() {
        return new Read(this.proxy, this.request, this.callbackContext, this.client, this.logger).simpleRequest(this.model);
    }

    protected ProgressEvent<ResourceModel, CallbackContext>  handleError(Exception exception) {
        return ProgressEvent.defaultFailureHandler(exception, ExceptionMapper.mapToHandlerErrorCode(exception));
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