inPropertyExpression = ipe;

        boolean spreadSafe = pe.isSpreadSafe();
        PropertyExpression old = pe;
        pe = new PropertyExpression(objectExpression, property, pe.isSafe());
        pe.setSpreadSafe(spreadSafe);
        pe.setSourcePosition(old);

        String className = lookupClassName(pe);
        if (className != null) {

The Kotlin DSL replaces such dynamic resolution with type-safe model accessors that work with model elements contributed by plugins.

[[kotdsl:accessor_applicability]]
=== Understanding when type-safe model accessors are available

The Kotlin DSL currently provides various sets of type-safe model accessors, each tailored to different scopes.

    }

    def "inserting into an undefined property is undefined-safe"() {
        given:
        property.set((Map) null)
        property.insert('k4', '4')

        expect:
        assertValueIs(['k4': '4'])
    }

    def "inserting after putting an undefined element provider is undefined-safe"() {
        given:
        property.putAll(Providers.of([k1: '1', k2: '2']))

   * ordering of the keys.
   *
   * <p>Despite the method name, this method attempts to avoid actually copying the data when it is
   * safe to do so. The exact circumstances under which a copy will or will not be performed are
   * undocumented and subject to change.
   *
   * <p>This method is not type-safe, as it may be called on a map with keys that are not mutually
   * comparable.
   *

   * ordering of the keys.
   *
   * <p>Despite the method name, this method attempts to avoid actually copying the data when it is
   * safe to do so. The exact circumstances under which a copy will or will not be performed are
   * undocumented and subject to change.
   *
   * <p>This method is not type-safe, as it may be called on a map with keys that are not mutually
   * comparable.
   *

    (ReduceOp $input, (Arith_ConstantOp $axes), ConstBoolAttrTrue),
    [(ShapeMatchesReduceWithKeepAxes $input, $axes, $shape),
     (HasOneUse $reduce)]>;
}


def IsSame : Constraint<CPred<"$0 == $1">>;
def HasTwoUse : Constraint<CPred<
  "std::distance($0.use_begin(), $0.use_end()) == 2">>;
def AxesIsLastDimension : Constraint<CPred<

    for (Map.Entry<? extends V, ? extends K> entry : source.entries()) {
      dest.put(entry.getValue(), entry.getKey());
    }
    return dest;
  }

  /**
   * Returns a synchronized (thread-safe) multimap backed by the specified multimap. In order to
   * guarantee serial access, it is critical that <b>all</b> access to the backing multimap is
   * accomplished through the returned multimap.
   *

    for (Map.Entry<? extends V, ? extends K> entry : source.entries()) {
      dest.put(entry.getValue(), entry.getKey());
    }
    return dest;
  }

  /**
   * Returns a synchronized (thread-safe) multimap backed by the specified multimap. In order to
   * guarantee serial access, it is critical that <b>all</b> access to the backing multimap is
   * accomplished through the returned multimap.
   *

    return emptyListIterator();
  }

  /**
   * Returns the empty iterator.
   *
   * <p>The {@link Iterable} equivalent of this method is {@link ImmutableSet#of()}.
   */
  // Casting to any type is safe since there are no actual elements.
  @SuppressWarnings("unchecked")
  static <T extends @Nullable Object> UnmodifiableListIterator<T> emptyListIterator() {
    return (UnmodifiableListIterator<T>) ArrayItr.EMPTY;
  }

    return emptyListIterator();
  }

  /**
   * Returns the empty iterator.
   *
   * <p>The {@link Iterable} equivalent of this method is {@link ImmutableSet#of()}.
   */
  // Casting to any type is safe since there are no actual elements.
  @SuppressWarnings("unchecked")
  static <T extends @Nullable Object> UnmodifiableListIterator<T> emptyListIterator() {
    return (UnmodifiableListIterator<T>) ArrayItr.EMPTY;
  }