config-file example throws

[ghost]

Using kahlan@3.1.4 and given the following snippet from https://kahlan.github.io/docs/config-file.html:

// Use the `Coveralls` class to write the JSON coverage into a file
Coveralls::write([
    'coverage' => $coverage,
    'file' => $this->commandLine()->get('coverage-coveralls'),
    'service_name' => 'travis-ci',
    'service_job_id' => getenv('TRAVIS_JOB_ID') ?: null
]);

The following error is produced upon compiling:

PHP Fatal error:  Uncaught Error: Call to a member function export()

I traced the code through the specs and it seems the issue is due to a given Exporters write method wanting to take an instantiated Collector object as an input 'collector' option.

[ghost]

Think I found my answer, thanks to kahlan dogfooding its own config.