ninja-forms-model-abstract.php

<?php

// Get the ID for a Model
$id = $model->get_id();

// Get a single setting for a Model by key
$setting = $model->get_setting( 'key' );

// Get all settings for a model
$settings = $model->get_settings();

// Get extra data stored with a submission.
$more_data = $model->get_extra_value( 'more_data' );

// Update a single setting for a model and save
$model->update_setting( 'key', 'value' )->save();

// Update an array of settings for a mdoel and save
$model->update_settings( $settings )->save();

// Delete a model
$model->delete();

// Save changes to a model
$model->save();

You have a small misspelling on one of your descriptions.
Line 18:
// Update an array of settings for a mdoel and save

// Update an array of settings for a model and save