presto-main/src/main/java/io/prestosql/operator/project/ConstantPageProjection.java/ConstantPageProjection/ConstantPageProjection
class ConstantPageProjection:    public ConstantPageProjection(Object value, Type type)
    {
        this.type = type;
        BlockBuilder blockBuilder = type.createBlockBuilder(null, 1);
        writeNativeValue(type, blockBuilder, value);
        this.value = blockBuilder.build();
    }