Setting VCursor to nil

[Brendan Murphy]

Page 138 in the V4RB reference it says, "Note: When finished with
a cursor, you must assign it the value nil to destroy it and free
memory." Ordinarily under REALbasic you do not have to set items
to nil to free them because when they go out of scope they are
freed automatically. Can you clarify why this is stated for
VCursor. Is there a problem with the plugin that requires us to
set it to nil?

Does this apply to creating cursors using the SQLSelect method?