Passing variables declared in generics across methods

Consider the following S3 class:

stuff <- function(x, y) {
  this <- x[[1]]
} <- function(x, y) {
  this %in% y
} <- function(x, y) {
  names(this) %in% y

R CMD check complains that there is no visible binding for global variable ‘this’.

Is there a way to pass this across methods without making R unhappy and without declaring this in the global environment?

I think you can put utils::globalVariables("this") in your package, see the manual for details and CRAN packages for examples: Sign in to GitHub · GitHub

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