Does anyone have a txn hash example of a Plasma txn storing data on Ethereum mainnet?

I'm studying about L2 solutions and came up with Plasma chains, which as far as I understand it join together a bunch of transactions made off-chain to be stored on-chain on Ethereum mainnet.

So I'm curios to see what looks like a transaction like that, sending a lot of transactions at once, curious to see how much gas was spent, what method was used, etc.