dart:typed_data getUint64 method    int getUint64(

int byteOffset,  [Endian endian = Endian.big] )  Returns the positive integer represented by the eight bytes starting at the specified byteOffset in this object, in unsigned binary form. The return value will be between 0 and 264 - 1, inclusive. The byteOffset must be non-negative, and byteOffset + 8 must be less than or equal to the length of this object. Implementation int getUint64(int byteOffset, [Endian endian = Endian.big]);

    
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