ZipItem<I1, I2>  class 
    Null safety
 
Class for a pair belonging to a zip with some functionality including: swapping, ==, to & From type constructors, [] operations.
Constructors
- ZipItem(I1 item1, I2 item2)
 - ZipItem.fromList(List list)
 - 
          Creates ZipItem from list of exactly 2
            factory
 - 
          ZipItem.fromMap(Map<
String, dynamic> map) - 
          
            factory
 
Properties
Methods
- 
  copyWith(
{I1? item1, I2? item2}) → ZipItem< I1, I2>  - 
  noSuchMethod(
Invocation invocation) → dynamic  - 
  Invoked when a non-existent method or property is accessed.
  inherited
 - 
  swap(
) → ZipItem< I2, I1>  - Returns shallow copy with item1 & item2 swapped
 - 
  toList(
) → List  - 
  toMap(
) → Map< String, dynamic>  - 
  toString(
) → String  - 
  A string representation of this object.
  override
 
Operators
- 
  operator ==(
Object other) → bool  - 
  The equality operator.
  override
 - 
  operator [](
int index) → dynamic  - 
  
[0]retrieves first item[1]retrieves 2nd, negative numbers retrieve[0]if even or[1]if odd - 
  operator []=(
int index, dynamic newVal) → void