private void computeHistogram(int byteCount) {
		Arrays.fill(histogram, 0);
		for (int i = 0; i < byteCount; ++i) {
			histogram[128 + chunkBuffer[i]] += 1;
		}
	}
Service for associating colors with a programs address's based on an Entropy computation for
the bytes in a chunk around the given address.
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/overview/entropy/EntropyOverviewColorService.java