code: public Object get(String key) {
  
  	Bindings nn = getBindings(ScriptContext.ENGINE_SCOPE);
  	if (nn != null) {
  	    return nn.get(key);
  	}
  
  	return null;
      }
docs: Gets the value for the specified key in the <code>ENGINE_SCOPE</code> of the protected
  <code>context</code> field.
  
  @return The value for the specified key.
  
  @throws NullPointerException if key is null.
  @throws IllegalArgumentException if key is empty.