RenderSurface IsUpdateQueued

When i queue an update to a RenderSurface i know that it gets executed at the end of the current frame. With the result obtained on the next frame.

However render surface has these two functions:

/// Return whether manual update queued. Called internally.
bool IsUpdateQueued() const { return updateQueued_; }

/// Reset update queued flag. Called internally.
void ResetUpdateQueued();

My question is:
Does the IsUpdateQueued function reset to false, after a queue update, when the rendering of this render surface is finished?

Since these two functions are called internally i would like to know when are they being called.