@Override
	public int hashCode() {
		return Objects.hash(model.getClass(), columnIndex, constraints);
	}
Returns true if this is a String constraint or a type converting constraint where the type
is converted to a string constraint. (i.e. uses a String editor)
@param constraint the constraint to check.
@return true if this is a String constraint or something that is converted to a string constraint.
Ghidra/Framework/Docking/src/main/java/docking/widgets/table/columnfilter/ColumnConstraintSet.java