interface IDiamondLoupe {

    struct Facet {
        address facetAddress;
        bytes4[] functionSelectors;
    }

    /// @notice Gets all facet addresses and their four byte function selectors.
    /// @return facets_ Facet
    function facets() external view returns (Facet[] memory facets_);

    /// @notice Gets all the function selectors supported by a specific facet.
    /// @param _facet The facet address.
    /// @return facetFunctionSelectors_
    function facetFunctionSelectors(address _facet) external view returns (bytes4[] memory facetFunctionSelectors_);

    /// @notice Get all the facet addresses used by a diamond.
    /// @return facetAddresses_
    function facetAddresses() external view returns (address[] memory facetAddresses_);

    /// @notice Gets the facet that supports the given selector.
    /// @dev If facet is not found return address(0).
    /// @param _functionSelector The function selector.
    /// @return facetAddress_ The facet address.
    function facetAddress(bytes4 _functionSelector) external view returns (address facetAddress_);
}
/**
 * @title IDiamondLoupe
 *
 * @notice Diamond Facet inspection
 *
 * Reference Implementation  : https://github.com/mudgen/diamond-2-hardhat
 * EIP-2535 Diamond Standard : https://eips.ethereum.org/EIPS/eip-2535
 *
 * The ERC-165 identifier for this interface is: 0x48e2b093
 *
 * @author Nick Mudge <nick@perfectabstractions.com> (https://twitter.com/mudgen)
 */
function facetAddresses() external view returns (address[] memory facetAddresses_);

/// @notice Get all the facet addresses used by a diamond.
/// @return facetAddresses_