Specifies a list of fields within the document which should be fetched.
This allows for easy retrieval of select fields without incurring the
overhead of fetching the whole document.
Optional timeout
timeout?:number
The timeout for this operation, represented in milliseconds.
Specifies a list of fields within the document which should be fetched. This allows for easy retrieval of select fields without incurring the overhead of fetching the whole document.