public ArrayList<SsaInsn>[] getUseListCopy() {
    if (useList == null) {
      buildUseList();
    }

    ArrayList<SsaInsn>[] useListCopy = (ArrayList<SsaInsn>[]) (new ArrayList[registerCount]);

    for (int i = 0; i < registerCount; i++) {
      useListCopy[i] = (ArrayList<SsaInsn>) (new ArrayList(useList[i]));
    }

    return useListCopy;
  }
Returns a modifiable copy of the register use list.

@return modifiable copy of the use-list, indexed by register
android/android_framework/dex-maker/src/main/java/com/android/dx/ssa/SsaMethod.java