public void setOnStart(java.util.Collection<NotebookInstanceLifecycleHook> onStart) {
        if (onStart == null) {
            this.onStart = null;
            return;
        }

        this.onStart = new java.util.ArrayList<NotebookInstanceLifecycleHook>(onStart);
    }
<p>
The shell script that runs every time you start a notebook instance, including when you create the notebook
instance.
</p>

@param onStart
       The shell script that runs every time you start a notebook instance, including when you create the
       notebook instance.
aws-java-sdk-sagemaker/src/main/java/com/amazonaws/services/sagemaker/model/DescribeNotebookInstanceLifecycleConfigResult.java