class ConfigurationService {
Configuration _configuration;

ConfigurationService(Configuration configuration)
: assert(configuration != null),
_configuration = configuration {

}

void set configuration(Configuration configuration)
: assert(configuration != null),
_configuration = configuration {

}

Configuration get configuration
: assert(_configuration != null),
_configuration = _configuration.foo {

return _configuration;
}

void method() : _configuration = null {

}

Foo() : _configuration = null {


}
}

class Configuration {
Configuration get foo => this;
}


class[KeywordToken] ConfigurationService[StringToken] {[BeginToken]
Configuration[StringToken] _configuration[StringToken];[SimpleToken]

ConfigurationService[StringToken]([BeginToken]Configuration[StringToken] configuration[StringToken])[SimpleToken]
:[SimpleToken] assert[KeywordToken]([BeginToken]configuration[StringToken] !=[SimpleToken] null[KeywordToken])[SimpleToken],[SimpleToken]
_configuration[StringToken] =[SimpleToken] configuration[StringToken] {[BeginToken]

}[SimpleToken]

void[KeywordToken] set[KeywordToken] configuration[StringToken]([BeginToken]Configuration[StringToken] configuration[StringToken])[SimpleToken]
:[SimpleToken] assert[KeywordToken]([BeginToken]configuration[StringToken] !=[SimpleToken] null[KeywordToken])[SimpleToken],[SimpleToken]
_configuration[StringToken] =[SimpleToken] configuration[StringToken] {[BeginToken]

}[SimpleToken]

Configuration[StringToken] get[KeywordToken] configuration[StringToken]
:[SimpleToken] assert[KeywordToken]([BeginToken]_configuration[StringToken] !=[SimpleToken] null[KeywordToken])[SimpleToken],[SimpleToken]
_configuration[StringToken] =[SimpleToken] _configuration[StringToken].[SimpleToken]foo[StringToken] {[BeginToken]

return[KeywordToken] _configuration[StringToken];[SimpleToken]
}[SimpleToken]

void[KeywordToken] method[StringToken]([BeginToken])[SimpleToken] :[SimpleToken] _configuration[StringToken] =[SimpleToken] null[KeywordToken] {[BeginToken]

}[SimpleToken]

Foo[StringToken]([BeginToken])[SimpleToken] :[SimpleToken] _configuration[StringToken] =[SimpleToken] null[KeywordToken] {[BeginToken]


}[SimpleToken]
}[SimpleToken]

class[KeywordToken] Configuration[StringToken] {[BeginToken]
Configuration[StringToken] get[KeywordToken] foo[StringToken] =>[SimpleToken] this[KeywordToken];[SimpleToken]
}[SimpleToken]
[SimpleToken]