public String getFilterText() {
		return filterProvider.getFilterText();
	}
Re-filters the tree if the newNode should be included in the current filter results. If the
new node doesn't match the filter, there is no need to refilter the tree.

@param newNode the node that may cause the tree to refilter.
Ghidra/Framework/Docking/src/main/java/docking/widgets/tree/GTree.java