Return the address of the first element of the underlying array of control values in this table, or 0 if this table is in the zero-capacity state. An element of this array has the value FlatHashTable_GroupControl::k_EMPTY, FlatHashTable_GroupControl::k_ERASED, or a seven bit hashlet value for the in-use position (the highest-order bit is unset).
Declared in <bdlc_flathashtable.h>
uint8_t const*
controls() const;