My Firestore package

BulkCreate creates documents using [firestore.BulkWriter].

BulkUpdate updates documents using [firestore.BulkWriter].

Create stores a document of type item.

GetAll gets all document from collection `newItem.TableName()`.

GetOne get a document by id.

Set will create a document or update with [firestore.MergeAll] option.

Update updates document fv[field, value] with checking existing.

Where for [firestore.Query.Where].