According to https://eips.ethereum.org/EIPS/eip-1155, you have to implement a uri function for contract supports ERC1155Metadata_URI extension.
But in the ERC1155Mintable.sol it registers 0x0e89341c for erc165 but doesn't have a implementation of uri.
According to https://eips.ethereum.org/EIPS/eip-1155, you have to implement a
urifunction for contract supports ERC1155Metadata_URI extension.But in the
ERC1155Mintable.solit registers0x0e89341cfor erc165 but doesn't have a implementation ofuri.