anchor.diff:  This section summarizes the changes that you need to be aware of when migrating
   your application from one version of {xpack} to another.
   
  +* <<breaking-6.3.0-xes>>
   * <<breaking-6.2.0-xes>>
   * <<breaking-6.1.0-xes>>
   * <<breaking-6.0.0-xes>>
  
positive.code: 
  --
  [role="xpack"]
  [[breaking-6.2.0-xes]]
  == {xpack} Breaking changes in 6.3
  
  This section summarizes the changes that you need to be aware of when migrating
  
negative.code: Security::
  
  * The legacy `XPackExtension` extension mechanism has been removed and replaced
  with an SPI based extension mechanism that is installed and built as an
  elasticsearch plugin.
  
  [role="xpack"]
  [[breaking-6.2.0-xes]]
  == {xpack} Breaking changes in 6.2
  