Use the Unity Package Manager Client class to manage the packages used in a project.
注意：只能按顺序调用客户端方法。如果尝试同时添加或删除多个包，结果将具有不确定性。例如，如果在 Remove 操作正在进行或已排队时对包调用 Remove 方法，则可能覆盖当前操作，并且只处理最新的 Remove 操作。
| LogLevel | Gets or sets the log level that the Package Manager uses when logging to the Editor.log and upm.log files. Defaults to LogLevel.Info. |
| Add | Adds a package dependency to the project. Requesting a new or different dependency often leads to changing installed packages, but only after the Package Manager constructs a dependency graph to solve any version conflicts. For more information, see Dependency and resolution. |
| Embed | Embeds a package inside the project. |
| List | 列出项目所依赖的包。 |
| Pack | 从包文件夹中创建一个 GZip tarball 文件。该文件的格式和内容与将包发布到包注册表时的文件相同。 |
| Remove | Removes a package dependency from the project. Removing a dependency often leads to changing installed packages, but only after the Package Manager constructs a dependency graph to solve any version conflicts. For more information, see Dependency and resolution. |
| ResetToEditorDefaults | Resets the list of packages installed for this project to the editor's default configuration. This operation clears all packages added to the project and keeps only the packages set for the current editor's default configuration. |
| Resolve | Forces the Package Manager to resolve the project's packages, reinstalling any altered or missing package and removing extraneous packages. |
| Search | 搜索 Unity 包注册表以获取给定的包。 |
| SearchAll | 在 Unity 包注册表中搜索与当前 Unity 版本兼容的所有包。 |