anchor.diff:  Now Spring Security can be used within your queries.
   For example:
   
  -[source,java]
  +====
  +.Java
  +[source,java,role="primary"]
   ----
   @Repository
   public interface MessageRepository extends PagingAndSortingRepository<Message,Long> {
  
positive.code: [[data-configuration]]
  == Spring Data & Spring Security Configuration
  
  To use this support, add `org.springframework.security:spring-security-data` dependency and provide a bean of type `SecurityEvaluationContextExtension`.
  In Java Configuration, this would look like:
  
  [source,java]
  ----
  @Bean
  public SecurityEvaluationContextExtension securityEvaluationContextExtension() {
  	return new SecurityEvaluationContextExtension();
  }
  ----
  
  In XML Configuration, this would look like:
  
  
negative.code: }
  ----
  
  .Kotlin
  [source,kotlin,role="secondary"]
  ----
  @Repository
  interface MessageRepository : PagingAndSortingRepository<Message,Long> {
  	@Query("select m from Message m where m.to.id = ?#{ principal?.id }")
  	fun findInbox(pageable: Pageable): Page<Message>
  }
  ----
  ====
  
  This checks to see if the `Authentication.getPrincipal().getId()` is equal to the recipient of the `Message`.
  Note that this example assumes you have customized the principal to be an Object that has an id property.
  By exposing the `SecurityEvaluationContextExtension` bean, all of the xref:servlet/authorization/expression-based.adoc#common-expressions[Common Security Expressions] are available within the Query.
  