static BlockCanaryInternals getInstance() {
        if (sInstance == null) {
            synchronized (BlockCanaryInternals.class) {
                if (sInstance == null) {
                    sInstance = new BlockCanaryInternals();
                }
            }
        }
        return sInstance;
    }
Get BlockCanaryInternals singleton

@return BlockCanaryInternals instance
blockcanary-analyzer/src/main/java/com/github/moduth/blockcanary/BlockCanaryInternals.java