gtk-tree-model-filter-clear-cache (filter)

filter -- a gtk-tree-model-filter object

This function clears the filter of any cached iterators that have not been reffed with the function gtk-tree-model-ref-node. This function should almost never be called.

This might be useful if the child model being filtered is static, does not change often, and there has been a lot of unreffed access to nodes. As a side effect of this function, all unreffed iterators will be invalid.