Add toString to lambda object

[boretti]

No description provided.

[codecov]

Codecov Report

Merging #31 into master will increase coverage by 0.01%.
The diff coverage is 100%.

@@             Coverage Diff              @@
##             master      #31      +/-   ##
============================================
+ Coverage     99.02%   99.04%   +0.01%     
- Complexity      115      117       +2     
============================================
  Files            13       13              
  Lines           206      209       +3     
  Branches          4        4              
============================================
+ Hits            204      207       +3     
  Misses            1        1              
  Partials          1        1

Flag	Coverage Δ	Complexity Δ
#unitlinuxopenjdk10	99.04% <100%> (+0.01%)	117 <5> (+2)	⬆️
#unitlinuxopenjdk11	99.04% <100%> (+0.01%)	117 <5> (+2)	⬆️
#unitlinuxoraclejdk11	99.04% <100%> (+0.01%)	117 <5> (+2)	⬆️
#unitlinuxoraclejdk9	99.03% <100%> (+0.01%)	117 <5> (+2)	⬆️

Impacted Files	Coverage Δ	Complexity Δ
...unit/extensions/async/lang/WaitResultBuilder2.java	100% <100%> (ø)	7 <5> (+2)	⬆️

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[coveralls]

Coverage increased (+0.007%) to 99.519% when pulling 4e29775 on toString into 030bc75 on master.