default void customize(C codegenContext) {
        // Does nothing by default.
    }
Allows generators to write additional files, perform additional tasks, and
interact directly with a {@link FileManifest} used to write files to the plugin's
output.

<p>This method should generally be invoked at the end of the code generation process.

@param codegenContext Code generation context that can be queried when writing additional files.
smithy-codegen-core/src/main/java/software/amazon/smithy/codegen/core/SmithyIntegration.java