function readArrayOfH3Indexes(cAddress, maxCount) {
    const out = [];
    for (let i = 0; i < maxCount; i++) {
        const h3Index = readH3IndexFromPointer(cAddress, i);
        if (h3Index !== null) {
            out.push(h3Index);
        }
    }
    return out;
}
Read an array of 64-bit H3 indexes from C and convert to a JS array of
H3 index strings
@private
@param  {number} cAddress    Pointer to C ouput array
@param  {number} maxCount    Max number of hexagons in array. Hexagons with
                             the value 0 will be skipped, so this isn't
                             necessarily the length of the output array.
@return {H3Index[]}          Array of H3 indexes