Merge branch 'gc-add-api' into 'master'

Mikhail Piatliou (EPAM)requested to merge
cherry-pick-7f06e829 into release/0.21

GONRG-7276: added gc api for df tf

See merge request !1142 (merged)

(cherry picked from commit 7f06e829)

03bb9a86 GONRG-7276: added gc api for df tf

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