public static DoubleSpan validateViewRange(Span<? extends Number, ?> fullSpan) {
		return new DoubleSpan(fullSpan.min().doubleValue(), fullSpan.max().doubleValue());
	}
Validate the given span and convert its endpoints to doubles

@param fullSpan the span to validate
@return the converted span
Ghidra/Debug/ProposedUtils/src/main/java/docking/widgets/table/SpannedRenderer.java