Method freeze

src/test/java/net/starlark/java/eval/ScriptTest.java:165–181

(Object x, StarlarkThread thread)

  }

  @StarlarkMethod(
      name = "freeze",
      doc = "Shallow-freezes the operand. With no argument, freezes the thread.",
      parameters = {@Param(name = "x", defaultValue = "unbound")},
      useStarlarkThread = true)
  public void freeze(Object x, StarlarkThread thread) throws EvalException {
    if (x == Starlark.UNBOUND) {
      thread.mutability().close();
      return;
    }

    if (x instanceof Mutability.Freezable) {
      ((Mutability.Freezable) x).unsafeShallowFreeze();
    } else {
      throw Starlark.errorf("%s value is not freezable", Starlark.type(x));
    }
  }

  @StarlarkMethod(
      name = "int_mul_slow",