61     size_t head = writeU16(1, out.data(), 0);             // major version  in buildFvarTable()  local
62     head = writeU16(0, out.data(), head);                 // minor version  in buildFvarTable()
63     head = writeU16(HEADER_SIZE, out.data(), head);       // axes array offset  in buildFvarTable()
64     head = writeU16(2, out.data(), head);                 // reserved  in buildFvarTable()
65     head = writeU16(fvars.size(), out.data(), head);      // count of axes  in buildFvarTable()
66     head = writeU16(AXIS_RECORD_SIZE, out.data(), head);  // size of variaiton axis record  in buildFvarTable()
67     head = writeU16(0, out.data(), head);                 // number of instance record count  in buildFvarTable()
68     head = writeU16(0, out.data(), head);                 // instance record size  in buildFvarTable()
71         head = writeU32(fvar.tag, out.data(), head);  in buildFvarTable()
72         head = writeU32(floatToFixed(fvar.minValue), out.data(), head);  in buildFvarTable()
73         head = writeU32(floatToFixed(fvar.defaultValue), out.data(), head);  in buildFvarTable()
74         head = writeU32(floatToFixed(fvar.maxValue), out.data(), head);  in buildFvarTable()
75         head = writeU16(0, out.data(), head);  // flags  in buildFvarTable()
76         head = writeU16(0, out.data(), head);  // axis name ID  in buildFvarTable()