Kotlin에서 JPA 사용 시 mutable collection 사용하기

[jangjunha]

...BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [...]: Collection '...Restaurant.menuItems' is declared with a raw type and has an explicit 'targetEntity'
...
Caused by: org.hibernate.AnnotationException: Collection '...Restaurant.menuItems' is declared with a raw type and has an explicit 'targetEntity'

from

data class Restaurant (
   var menuItems: List<MenuItem>
)

to

data class Restaurant (
   var menuItems: MutableList<MenuItem>
)