public FileManifest getFileManifest() {
        return fileManifest;
    }
Gets the FileManifest used to create files in the projection.

<p>All files written by a plugin should either be written using this
manifest or added to the manifest via {@link FileManifest#addFile}.

@return Returns the file manifest.
smithy-build/src/main/java/software/amazon/smithy/build/PluginContext.java