Add a function for serializing an input before bookmarking application state — setSerializer
  v1.7.3|Source: 
  
  
    
R/serializers.R
  Description
Add a function for serializing an input before bookmarking application state
Arguments
- inputId
 Name of the input value.
- fun
 A function that takes the input value and returns a modified value. The returned value will be used for the test snapshot.
- session
 A Shiny session object.