public void forEachPhiInsn(PhiInsn.Visitor v) {
    for (SsaBasicBlock block : blocks) {
      block.forEachPhiInsn(v);
    }
  }
Visits each phi insn in this method

@param v {@code non-null;} callback.
android/android_framework/dex-maker/src/main/java/com/android/dx/ssa/SsaMethod.java