code: func (a *Address) SetBytes(b []byte) {
  	if len(b) > len(a) {
  		b = b[len(b)-AddressLength:]
  	}
  	copy(a[AddressLength-len(b):], b)
  }
docs: // SetBytes sets the address to the value of b.
  // If b is larger than len(a) it will panic.