This is about the new note

Depends: includes the non-default packages:
  ‘BiocGenerics’ ‘Biobase’ ‘lattice’ ‘reshape’ ‘GenomicRanges’
  ‘Biostrings’ ‘bumphunter’
Adding so many packages to the search path is excessive and importing
selectively is preferable.

Let us say my package A either uses a class B (by producing an object that
has B embedded as a slot) from another package or provides a specific
method for a generic defined in another package (both examples using S4).
 In both case my impression is that best practices is I ought to Depend on
such a package, so it is a available at run time to the user.

Comments?

Best,
Kasper

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