public byte[] getInstructionMask() {
		buildMasks();
		return instructionMask;
	}
Returns the instruction bit mask which identifies those bits used to uniquely identify
the instruction (includes addressing modes, generally excludes register selector bits
associated with attaches or immediate values used in for semantic values only).
@throws IllegalStateException if prototype parse failed
@see #getFormattedInstructionMask(int) getFormattedInstructionMask(-1)
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/app/plugin/processors/sleigh/SleighDebugLogger.java