presto-main/src/main/java/io/prestosql/operator/scalar/RowEqualOperator.java/RowEqualOperator/RowEqualOperator
class RowEqualOperator:    private RowEqualOperator()
    {
        super(EQUAL,
                ImmutableList.of(comparableWithVariadicBound("T", "row")),
                ImmutableList.of(),
                BOOLEAN.getTypeSignature(),
                ImmutableList.of(new TypeSignature("T"), new TypeSignature("T")),
                true);
    }