docs: adds .xData slot documentation

Author: averissimo

R/qenv-class.R

@@ -4,7 +4,7 @@
 #' @name qenv-class
 #' @rdname qenv-class
 #' @slot code (`character`) representing code necessary to reproduce the environment
-#' @slot env (`environment`) environment which content was generated by the evaluation
+#' @slot .xData (`environment`) environment with content was generated by the evaluation
 #'  of the `code` slot.
 #' @slot id (`integer`) random identifier of the code element to make sure uniqueness
 #'  when joining.