static FixedField addToFixedField(Field fixedField, long increment) {
		FixedField f = (FixedField) fixedField;
		byte[] valueBytes = f.getBinaryData();
		BigInteger v = new BigInteger(1, valueBytes);
		v = v.add(BigInteger.valueOf(increment));
		byte[] resultBytes = v.toByteArray();
		if (resultBytes.length > valueBytes.length) {
			if (resultBytes[0] != 0) {
				throw new UnsupportedOperationException("overflow in test data");
			}
			byte[] b = new byte[valueBytes.length];
			System.arraycopy(resultBytes, 1, b, 0, valueBytes.length);
			resultBytes = b;
		}
		else if (resultBytes.length < valueBytes.length) {
			byte[] b = new byte[valueBytes.length];
			System.arraycopy(resultBytes, 0, b, valueBytes.length - resultBytes.length,
				resultBytes.length);
			resultBytes = b;
		}
		FixedField r = f.newField();
		r.setBinaryData(resultBytes);
		return r;
	}
Create a new record.  Only use with Long Key tables.
@param table table
@param key record key
 @param varDataSize number of bytes created for all variable length fields
@param doInsert insert record into table if true
@return Record new record
@throws IOException
@throws DuplicateKeyException record with assigned key already exists in table.
Ghidra/Framework/DB/src/test/java/db/DBTestUtils.java