How do i check if a Chest is part of a doublechest?

[CHECKERCE]

my approach would be to look at the chest's NBT Data which looks something like this:

[facing=south,type=right,waterlogged=false]{Items:[{Count:64b,Slot:0b,id:"minecraft:crimson_stem"}]}

type=right indicates that it is the right side of a double chest,
but i have no idea of how to get the NBT Data of a block entity.

I tried:
let chestBlock = bot.blockAt(chestPosition, true)
blockEntity = chestBlock.blockEntity

because the documentation states:

Also block.blockEntity is additional field with block entity data as Object.

but this doesn't work, blockEntity is null

[amoraschi]

You could try checking the block.shapes, which is an Array of numbers that indicate the dimensions of the block

[CHECKERCE]

tried it and it actually works.
it's a weird approach but i will use it until i find a better option.

thank you.