package Ġbr . u fr n . im d . ob a . domain Ċ Ċ import Ġjava . io . Serializable Ċ import Ġjavax . persistence . Column Ċ import Ġjavax . persistence . Embed d able Ċ Ċ @ Embed d able Ċ data Ġclass ĠLearning Object Pl ata form PK ( ĊĠĠĠ Ġ@ Column ( name =" learning _ object _ id ", Ġnullable Ġ= Ġfalse ) ĊĠĠĠ Ġval Ġlearning ObjectId : ĠLong Ġ= Ġ 0 L , ĊĊĠĠĠ Ġ@ Column ( name =" pl ata form _ id ", Ġnullable Ġ= Ġfalse ) ĊĠĠĠ Ġval Ġpl ata form Id : ĠLong Ġ= Ġ 0 L , Ċ ): ĠSerializable Ċ