Add a function for serializing an input before bookmarking application state — setSerializer
  v1.8.1|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.