presto-spi/src/main/java/io/prestosql/spi/connector/SchemaTablePrefix.java/SchemaTablePrefix/toSchemaTableName
class SchemaTablePrefix:    public SchemaTableName toSchemaTableName()
    {
        return toOptionalSchemaTableName()
                .orElseThrow(() -> new IllegalStateException("both schemaName and tableName must be set"));
    }