presto-google-sheets/src/main/java/io/prestosql/plugin/google/sheets/SheetsClient.java/SheetsClient/readAllValues
class SheetsClient:    public List<List<Object>> readAllValues(String tableName)
    {
        try {
            Optional<String> sheetExpression = tableSheetMappingCache.getUnchecked(tableName);
            if (!sheetExpression.isPresent()) {
                throw new PrestoException(SHEETS_UNKNOWN_TABLE_ERROR, "Sheet expression not found for table " + tableName);
            }
            return sheetDataCache.getUnchecked(sheetExpression.get());
        }
        catch (UncheckedExecutionException e) {
            throwIfInstanceOf(e.getCause(), PrestoException.class);
            throw new PrestoException(SHEETS_TABLE_LOAD_ERROR, "Error loading data for table: " + tableName, e);
        }
    }