public default ColumnConstraintFilterMode getColumnConstraintFilterMode() {
		return ColumnConstraintFilterMode.ALLOW_RENDERER_STRING_FILTER_ONLY;
	}
Returns the current mode of how column constraints will be used to filter this column

<P>This method is typically not overridden.  This is only needed in rare cases, such as
when a column uses a renderer, but does *not* want this column to be filtered using
a String column constraint.   Or, if a column uses a renderer and wants that text to 
be available as a filter, along with any other column constraints.
@return the mode
Ghidra/Framework/Docking/src/main/java/ghidra/util/table/column/GColumnRenderer.java