setUint64 method

void setUint64 (int byteOffset, int value, [ Endian endian = Endian.big ])

Sets the eight bytes starting at the specified byteOffset in this object to the unsigned binary representation of the specified value, which must fit in eight bytes.

In other words, value must be between 0 and 264 - 1, inclusive.

Throws RangeError if byteOffset is negative, or byteOffset + 8 is greater than the length of this object.

Implementation 

void setUint64(int byteOffset, int value, [Endian endian = Endian.big]) =>
    _unsupported();