Specifies the indexes to create. Each document in the array specifies a separate index.
optional
writeConcern: Document
Optional. A document expressing the write concern. Omit to use the default write concern.
optional
commitQuorum: number | string
Optional. The minimum number of data-bearing voting replica set members (i.e. commit quorum),
including the primary, that must report a successful index build before the primary marks the indexes as ready.
A “voting” member is any replica set member where members[n].votes is greater than 0.
optional
comment: Document
Optional. A user-provided comment to attach to this command. Once set