output

<changeSet  author="liquibase-docs"  id="output-example">  
    <output  target="STDERR">Make sure you feed the cat</output>  
</changeSet>

changeSet:  
  id:  output-example  
  author:  liquibase-docs  
  changes:  
  -  output:  
      message:  Make sure you feed the cat  
      target:  STDERR

{
  "changeSet":  {
    "id":  "output-example",
    "author":  "liquibase-docs",
    "changes":  [{
      "output":  {
        "message":  "Make sure you feed the cat",
        "target":  "STDERR"
      }
    }]
  }
}