This is a utility function for better formatting dragula's input.
It extracts the container names and their element order from the raw
input object.
Arguments
- x
dragula input.
Value
A named list where names are container IDs and values are
character vectors of element identifiers (from the drag attribute).
Examples
if (FALSE) { # \dontrun{
# Example call:
dragulaValue(input$dragula)
} # }