public String getToolTip(int columnIndex) {
		//@formatter:off
		List<ColumnConstraintSet<R, ?>> filtered =
			constraintSets.stream()
				.filter(cf -> cf.getColumnModelIndex() == columnIndex)
				.collect(Collectors.toList());
		//@formatter:on

		if (filtered.isEmpty()) {
			return null;
		}
		return getHtmlRepresentation(filtered);
	}
Return a tooltip  that describes the effect of this filter for a specific filter.

@param columnIndex the model index of the column to get a filter description of.
@return a tooltip that describes this filter for a specific column.
Ghidra/Framework/Docking/src/main/java/docking/widgets/table/columnfilter/ColumnBasedTableFilter.java