presto-main/src/main/java/io/prestosql/sql/gen/JoinFilterFunctionCompiler.java/JoinFilterFunctionCompiler/internalCompileFilterFunctionFactory
class JoinFilterFunctionCompiler:    private JoinFilterFunctionFactory internalCompileFilterFunctionFactory(RowExpression filterExpression, int leftBlocksSize)
    {
        Class<? extends InternalJoinFilterFunction> internalJoinFilterFunction = compileInternalJoinFilterFunction(filterExpression, leftBlocksSize);
        return new IsolatedJoinFilterFunctionFactory(internalJoinFilterFunction);
    }