Bulk Write Operations
typedef struct _mongoc_bulk_operation_t mongoc_bulk_operation_t;
The opaque type mongoc_bulk_operation_t provides an abstraction for submitting multiple write operations as a single batch.
After adding all of the write operations to the mongoc_bulk_operation_t, call mongoc_bulk_operation_execute() to execute the operation.
It is only valid to call mongoc_bulk_operation_execute() once. The mongoc_bulk_operation_t must be destroyed afterwards.