Filter operates on the elements like this
```
lis...
# getting-starteds
SiebelsTim
04/14/2018, 5:01 PMFilter operates on the elements like this
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listOf("a", "b", "c").filter { it == "a" }SiebelsTim
04/14/2018, 5:01 PMlistOf("a", "b", "c").filter { it == "a" }