private String getColumnFilterToolTip(TableModel model, int columnIndex) {
		ColumnBasedTableFilter<?> columnTableFilter = getColumnTableFilter(model);
		if (columnTableFilter == null) {
			return null;
		}
		return columnTableFilter.getToolTip(columnIndex);
	}
This is the cursor used by BasicTableHeaderUI to tell the user they can resize a column
Ghidra/Framework/Docking/src/main/java/docking/widgets/table/GTableHeader.java