public final boolean isInstanceInit() {
    return getNat().isInstanceInit();
  }
Gets whether this is a reference to an instance initialization method. This is just a
convenient shorthand for {@code getNat().isInstanceInit()}.

@return {@code true} iff this is a reference to an instance initialization method
android/android_framework/dex-maker/src/main/java/com/android/dx/rop/cst/CstBaseMethodRef.java