public void setMask(byte[] mask) {
		this.mask = mask;
	}
Takes two byte arrays and performs a bitwise OR on them.  The arrays must be of the same length.

@param arr1
@param arr2
@return null if the inputs are not valid
Ghidra/Features/Base/src/main/java/ghidra/features/base/memsearch/mnemonic/MaskValue.java