dart:indexed_db
 Observer class 
   - Annotations
   
   Constructors
  -  Observer(ObserverCallback callback) 
factory
   
   Properties
  -  hashCode → int 
read-only, inherited
  -  The hash code for this object. [...]  
  -  runtimeType → Type 
read-only, inherited
  -  A representation of the runtime type of the object.  
  
   Methods
  -  observe(Database db,  Transaction tx,  Map options) → void  
   -  unobserve(Database db) → void  
   -  noSuchMethod(Invocation invocation) → dynamic  
inherited
  -  Invoked when a non-existent method or property is accessed. [...]  
  -  toString() → String  
inherited
  -  Returns a string representation of this object.  
  
   Operators
  -  operator ==(dynamic other) → bool  
inherited
  -  The equality operator. [...]