Category class
- Constructors
- Category
- Properties
- hashCode
- runtimeType
- Methods
- noSuchMethod
- toString
- Operators
- operator ==
- Static properties
- animals
- backgrounds
- buildings
- business
- categories
- computer
- education
- fashion
- feelings
- food
- health
- industry
- music
- nature
- people
- places
- religion
- science
- sports
- transportation
- travel