public static boolean canIndex(Field field) {
		if (field == null) {
			return false;
		}
		if (field instanceof IndexField) {
			return false;
		}
		return !field.isSameType(BooleanField.INSTANCE) && !field.isSameType(ByteField.INSTANCE);
	}
Determine if a specified field instance may be indexed
@param field field to be checked
@return true if field can be indexed
Ghidra/Framework/DB/src/main/java/db/Field.java