Returns a row with the specieifed key wrapped in `OptionalValue`. When the specified key is not found, the result is `OptionalValue.Missing`. This method is generic and returns the result as a series containing values of the specified type. To get heterogeneous series of type `ObjectSeries<'TCol>`, use the `frame.Rows` property. ## Parameters - `rowKey` - Specifies the key of the row to be returned [category:Accessors and slicing]

Returns a row with the specieifed key wrapped in `OptionalValue`. When the specified key is not found, the result is `OptionalValue.Missing`. This method is generic and returns the result as a series containing values of the specified type. To get heterogeneous series of type `ObjectSeries<'TCol>`, use the `frame.Rows` property. ## Parameters - `rowKey` - Specifies the key of the row to be returned - `lookup` - Specifies how to find value in a frame with ordered rows when the key does not exactly match (look for nearest available value with the smaller/greater key). [category:Accessors and slicing]