Grails provide dynamic finders for class attributes as well as related entities. If a domain class phone is defined like this:

class Phone {

    String name
    String description
    static hasMany = [variations: Variation]
    static belongsTo = [manufacturer:Manufacturer]

    static constraints = {
        description nullable: true
    }
}

Then grails provide dynamic finders for phone object like:

phone.findByVariations() and phone.findByManufacturer. Netbeans provide dynamic finders auto complete for phone attributes like name and description in above example but not for manufacturer and variation.

Similarly grails provide dynamic methods for phone object to add and remove related entities like phone.addToVariations(Variations obj) and phone.removeFromVariations(Variations obj). Similar is the case for manufacturer too.