Return the number of 0 bits in the specified numBits beginning at the specified index in the specified bitString. The behavior is undefined unless bitString has a length of at least index + numBits.
Declared in <bdlb_bitstringutil.h>
static
std::size_t
num0(
uint64_t const* bitString,
std::size_t index,
std::size_t numBits);