* @param {Model} [options.include[].model] The model you want to eagerly load
* @param {String} [options.include[].as] The alias of the relation, in case the model you want to eagerly load is aliassed. For `hasOne` / `belongsTo`, this should be the singular name, and for `hasMany`, it should be the plural
* @param {Association} [options.include[].association] The association you want to eagerly load. (This can be used instead of providing a model/as pair)
* @param {Object} [options.include[].where] Where clauses to apply to the child models. Note that this converts the eager load to an inner join, unless you explicitly set `required: true`
* @param {Object} [options.include[].where] Where clauses to apply to the child models. Note that this converts the eager load to an inner join, unless you explicitly set `required: false`
* @param {Array<String>} [options.include[].attributes] A list of attributes to select from the child model
* @param {Boolean} [options.include[].required] If true, converts to an inner join, which means that the parent model will only be loaded if it has any matching children. True if `include.where` is set, false otherwise.
* @param {Array<Object|Model>} [options.include[].include] Load further nested related models