public Long getFullHashValueAtOrAfter(long value) throws IOException {
		LongField hashField = new LongField(value);
		DBFieldIterator indexFieldIterator =
			table.indexFieldIterator(hashField, null, true, FULL_HASH_COL);
		if (indexFieldIterator.hasNext()) {
			Field next = indexFieldIterator.next();
			return next.getLongValue();
		}
		return null;
	}
Returns the first full hash value in the table that is greater than or
equal to the provided argument.  Useful for iterating over all the function
records in (arbitrarily, but deterministically) sorted full hash order.
@param value the minimum hash value to seek
@return the lowest hash in the database greater than or equal to value, or null if no such hash
@throws IOException if database iteration encounters an error
Ghidra/Features/FunctionID/src/main/java/ghidra/feature/fid/db/FunctionsTable.java