/// Instantiate optionPoolRegistry
IOptionPoolRegistry optionPoolRegistry = IOptionPoolRegistry("/*optionPoolRegistryAddress*/");
address optionAddress = '0xe3..."
optionPoolRegistry.getPool(optionAddress)
// OptionPoolRegistry.sol
* @notice Returns the address of a previously created pool
* @dev If the pool has not been created it will return address(0)
* @param _optionAddress The address of option token
* @return The address of the pool
) external returns (address pool) {}