private Double toDouble(String s) {

		if (StringUtils.isBlank(s)) {
			return null;
		}

		try {
			return Double.parseDouble(s);
		}
		catch (NumberFormatException e) {
			return null;
		}
	}
Subclasses should return the Double value that is being filtered.

@param t The t from which to extract the Double value
@return the double value that is being filtered; convert T to a double
Ghidra/Features/VersionTracking/src/main/java/ghidra/feature/vt/gui/provider/matchtable/AbstractDoubleRangeFilter.java