# peek abstract method

IntStream peek(

1. void action(
   1. int
   )

)

Returns a stream consisting of the elements of this stream, additionally performing the provided action on each element as they are consumed.

## Example

    final result = IntStream.range(1, 5)
        .peek((n) => print('Processing: $n'))
        .map((n) => n * 2)
        .toList();

## Implementation

    IntStream peek(void Function(int) action);