t6.use:9:9: An arrow operation treating a single object as a set may only be applied, if the object results from a navigation to an association end with multiplicity 0..1.
package com.relationinfo.dao;
import java.io.Serializable;
import java.util.List;
/**
* Data Access Object (DAO) interface. This is an interface
* used to tag our DAO classes and to pro
package com.relationinfo.dao;
import java.io.Serializable;
import java.util.List;
/**
* Data Access Object (DAO) interface. This is an interface
* used to tag our DAO classes and to pro
package com.relationinfo.dao;
import java.io.Serializable;
import java.util.List;
/**
* Data Access Object (DAO) interface. This is an interface
* used to tag our DAO classes and to pro
