Print message for deprecated functions in Shiny

shinyDeprecated(new = NULL, msg = NULL,
  old = as.character([1L], version = NULL)


new Name of replacement function.
msg Message to print. If used, this will override the default message.
old Name of deprecated function.
version The last version of Shiny before the item was deprecated.


To disable these messages, use options(shiny.deprecation.messages=FALSE).