* file dependency, with the file path pointing to the attempted component selector.
         * This shows up in the IDE as a red flag in the dependencies view. That's not the best
         * usability and it also muddies the API contract, because we disguise an unresolved
         * dependency as a file dependency, even though that file really doesn't exist.
         *

    <exportedPackage>org.apache.maven.settings</exportedPackage>
    <exportedPackage>org.apache.maven.toolchain</exportedPackage>
    <exportedPackage>org.apache.maven.usability</exportedPackage>


    <!-- wagon-api -->
    <exportedPackage>org.apache.maven.wagon.*</exportedPackage>
    <exportedPackage>org.apache.maven.wagon.authentication</exportedPackage>

              <include>org.apache.maven.rtinfo.internal</include>
              <include>org.apache.maven.settings</include>
              <include>org.apache.maven.toolchain</include>
              <include>org.apache.maven.usability</include>
            </includes>
            <!-- allowed non-binary backwards compatible changes -->
            <excludes>
              <!-- START default constructor on Plexus/JSR 330 components -->

### Picking a collection type

There are a variety of collection types available.
Picking these is about simplicity, usability, and performance.

The `NewSingleton` form (`func() *O`), in theory, could be used universally.
Consider a transformation from `Pod` to `SimplePod`:

```go

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      Work (including but not limited to damages for loss of goodwill,
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