bson_value_copy()
Synopsis
void
bson_value_copy (const bson_value_t *src,
                 bson_value_t       *dst);Parameters
src  | 
A bson_value_t to copy from.  | 
dst  | 
A bson_value_t to copy into.  | 
Description
This function will copy the boxed content in src into dst. dst must be freed with bson_value_destroy() when no longer in use.