SecDefOptParamsRequest

Field	Type	Description
`reqId`	`int32`	Unique request identifier used for tracking across EWrapper
`underlyingSymbol`	`string`	Symbol of the underlying contract.
`futFopExchange`	`string`	The exchange on which the returned options are trading. Can be set to the empty string "" for all exchanges
`underlyingSecType`	`string`	Security or Asset type of the underlying contract.
`underlyingConId`	`int32`	IBKR Contract Identifier of the underlying contract.