anchor.diff:  
   [source,scala]
   ------------------------------
  -libraryDependencies += "com.github.fomkin" %% "korolev-jcache-support" % "0.4.1"
  +libraryDependencies += "com.github.fomkin" %% "korolev-jcache-support" % "0.4.2"
   ------------------------------
   
  -https://github.com/fomkin/korolev/blob/v0.4.1/examples/jcache/src/main/scala/JCacheExample.scala[See full example]
  +https://github.com/fomkin/korolev/blob/v0.4.2/examples/jcache/src/main/scala/JCacheExample.scala[See full example]
  
positive.code: 
  Use `onProgress` callback to handle progress of the form downloading. Function `start` return a `FormData`. Look API documentation for more details.
  
  https://github.com/fomkin/korolev/blob/v0.4.1/examples/form-data/src/main/scala/FormDataExample.scala[See full example]
  
  Delays
  ~~~~~~
  
negative.code: }
  -----------------------------------
  
  https://github.com/fomkin/korolev/blob/v0.4.2/examples/delay/src/main/scala/DelayExample.scala[See full example]
  
  Environment configurator
  ~~~~~~~~~~~~~~~~~~~~~~~~
  