anchor.diff:    /// Expiration status of the experiment "constant-update"
     static const bool constant_update_2018 = false;
   
  +  /// Expiration status of the experiment "control-flow-collections"
  +  static const bool control_flow_collections = false;
  +
     /// Expiration status of the experiment "non-nullable"
     static const bool non_nullable = false;
   
     /// Expiration status of the experiment "set-literals"
     static const bool set_literals = false;
   
  +  /// Expiration status of the experiment "spread-collections"
  +  static const bool spread_collections = false;
  +
     /// Expiration status of the experiment "bogus-disabled"
     static const bool bogus_disabled = true;
   
  
positive.code:   /// String to enable the experiment "constant-update"
    static const String constant_update_2018 = 'constant-update-2018';
  
    /// String to enable the experiment "non-nullable"
    static const String non_nullable = 'non-nullable';
  
    /// String to enable the experiment "set-literals"
    static const String set_literals = 'set-literals';
  
    /// String to enable the experiment "bogus-disabled"
    static const String bogus_disabled = 'bogus-disabled';
  
negative.code:   /// Default state of the experiment "constant-update"
    static const bool constant_update_2018 = false;
  
    /// Default state of the experiment "control-flow-collections"
    static const bool control_flow_collections = false;
  
    /// Default state of the experiment "non-nullable"
    static const bool non_nullable = false;
  
    /// Default state of the experiment "set-literals"
    static const bool set_literals = false;
  
    /// Default state of the experiment "spread-collections"
    static const bool spread_collections = false;
  
    /// Default state of the experiment "bogus-disabled"
    static const bool bogus_disabled = false;
  