Creates a reference to the private environment inside an object instance
Examples
TypeOne <- type(function(arg){
private[pvt_val] <- 2
})
instOne <- TypeOne(1)
expose_private(instOne)
#> <Q7instance:Q7default>
#> - .private: <environment>
instOne$.private
#> <environment: 0x56395ea796d0>
instOne$.private$pvt_val
#> [1] 2