SortBy class
实时位置搜索的排序方法
Constructors
- SortBy({String fieldName, SortType sortType})
 - 有参构造
 - SortBy.fromMap(Map map)
 - map => SortBy
 
Properties
Methods
- 
          noSuchMethod(
Invocation invocation) → dynamic  - 
          Invoked when a non-existent method or property is accessed. [...]
                  inherited
 - 
          toMap(
) → Map  - SortBy => map
 - 
          toString(
) → String  - 
          Returns a string representation of this object. 
                  override
 
Operators
- 
          operator ==(
Object other) → bool  - 
          The equality operator. [...]
                  inherited