How to make a custom field to be able to select values which are present in issue type hierachy?

[Kelvin Teng]

Hi,

Anyone know how to achieve the requirement below using script runner?

Thanks.

We have a custom field named Use Case (multiselect field) and we should only able to select the values which are present in the issue type hierachy. 

For example, Epic can only select those selected in Initiative.

For Story, only be able to select those in Epic.

For Sub-tasks, only be able to select those in Parent.