@Override
	public boolean accepts(StringDataInstance value, TableFilterContext context) {
		String s = value.getStringValue();
		return (s != null) && s.chars().allMatch(codePoint -> 0 <= codePoint && codePoint < 0x80);
	}
Tests if a string value contains only ASCII characters.
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/strings/IsAsciiColumnConstraint.java