I see this document.
But I don't understand what is an index position of an uncle.
I'd like to get informations of uncle blocks like etherscan.io
However I don't know a value of the index position what should be set.
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In a block multiple uncles can be included. This method returns only one uncle.
web3.eth.getUncle(blockHashOrBlockNumber, uncleIndex [, callback])
uncleIndex is a number starting from
0 which represents which uncle will be returned.
If for example a block has 2 uncles, the first uncle has
uncleIndex=0 while the second uncle has