[ Version ( since = "2.4" ) ]
public void clear_cache ()
This function should almost never be called.
It clears the this of any cached iterators that haven’t been reffed with ref_node. This might be useful if the child model being filtered is static (and doesn’t change often) and there has been a lot of unreffed access to nodes. As a side effect of this function, all unreffed iters will be invalid.
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