function storeH3Index(h3Index, cAddress, offset) {
    // HEAPU32 is a typed array projection on the index space
    // as unsigned 32-bit integers. This means the index needs
    // to be divided by SZ_INT (4) to access correctly. Also,
    // the H3 index is 64 bits, so we skip by twos as we're writing
    // to 32-bit integers in the proper order.
    C.HEAPU32.set(h3IndexToSplitLong(h3Index), cAddress / SZ_INT + 2 * offset);
}
Store an H3 index in C memory. Primarily used as an efficient way to
write sets of hexagons.
@private
@param  {H3IndexInput} h3Index  H3 index to store
@param  {number} cAddress  Pointer to allocated C memory
@param {number} offset     Offset, in number of H3 indexes from beginning
                           of the current array