... application.1
  The global statistical counters are used locally; hence they are compatible with the use of multiple managers.

      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .

... node.2
  When the variables in a group are reordered, the association between the low field and the index of the first variable in the group is lost. The package updates the tree to keep track of the changes. However, the application cannot rely on low to determine the position of variables.

      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .