Record-like getters support #212 #216

[Berlizov]

The rule for identifying getters has been modified to support record-like getters (#212). Now, any method that takes no parameters and returns a type other than void is considered a getter. Automatic generation has been disabled for methods returning a generic type (such as T or List<T>). Additionally, an issue with generating asserts with an empty parameter name for the get() method (#216) has been fixed.