bson_append_null()

Synopsis

bool
bson_append_null (bson_t     *bson,
                  const char *key,
                  int         key_length);

bson	A bson_t.
key	An ASCII C string containing the name of the field.
key_length	The length of key in bytes, or -1 to determine the length with strlen().

The bson_append_null() function shall append a new element to bson of type BSON_TYPE_NULL.

true if the operation was applied successfully, otherwise false and bson should be discarded.