Planet Formation

Licensed under the Apache License, Version 2.0 (the " License "); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/ LICENSE-2.0. Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an " as is " basis, without warranties or conditions of any kind, either express or implied. See the License for the specific language governing permissions and limitations under the License.