UIManager
    Functions
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                  Called on UIThread right after view updates are dispatched for a frame. Note that this will be called for every frame even if there are no updates.
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                  Called on UIThread right after view updates are executed.
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                  Called right after scheduleMountItems is called in Fabric, after a new tree is committed.
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                  Called right before view updates are dispatched at the end of a batch. This is useful if a module needs to add UIBlocks to the queue before it is flushed.
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                  Called on UIThread right before view updates are executed.