private LocalItem getLocalForNewReg(int ssaReg) {
    if (ssaReg < ssaRegToLocalItems.size()) {
      return ssaRegToLocalItems.get(ssaReg);
    } else {
      return null;
    }
  }
Gets a local variable item for a specified register.

@param ssaReg register in SSA name space
@return {@code null-ok;} Local variable name or null if none
android/android_framework/dex-maker/src/main/java/com/android/dx/ssa/SsaRenamer.java