AnalysisLanguage constructor Null safety

1. text_analysis
2. text_analysis
3. AnalysisLanguage
4. AnalysisLanguage constructor

AnalysisLanguage class

1. Constructors
2. AnalysisLanguage
3. Properties
4. bracketsAndCaretsSelector
5. hashCode
6. lineEndingSelector
7. punctuationSelector
8. runtimeType
9. sentenceEndingSelector
10. stopWords
11. Methods
12. noSuchMethod
13. toString
14. Operators
15. operator ==