val adminOf = user.roles
    .filter { it.isAdmin() }
    .map { it.entityId to it.entity }
    .toMap()
val serviceProviderOf = user.roles
    .filter { it.isServiceProvider() }
    .map { it.entityId to it.entity }
    .toMap()

partition

filter

.map { it.entityId to it.entity }
    .toMap()

.associate { it.entityId to it.entity }

.associateBy(
    keySelector = { it.entityId },
    valueTransform = { it.entity }
)

User::entityId