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