Valentin Shergin db7f98b789 Fabric: Introducing ShadowNode::shallowSourceNode()
Summary:
The method replaces the current source node with its source node.
It's useful when we have to clone some node but don't want to change a source node pointer.

Reviewed By: fkgozali

Differential Revision: D7503384

fbshipit-source-id: 81ec64079c7e99cb9abdda2af10d85281a94e1b1
2018-04-10 12:59:51 -07:00
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