public final function trimResults() : Splitter
    {
        $splitter = $this->copy();
        $splitter->omitEmptyStrings = $this->omitEmptyStrings;
        $splitter->trimResults = true;
        return $splitter;
    }
public final function trimResults() : Splitter
    {
        $splitter = $this->copy();
        $splitter->omitEmptyStrings = $this->omitEmptyStrings;
        $splitter->trimResults = true;
        return $splitter;
    }
Returns a splitter that behaves equivalently to this splitter, but
automatically removes leading and trailing whitespace characters
from each returned substring. For example
<pre>
Splitter::on(',')->trimResults()->split(' a, b ,c ')
</pre>
returns a Traversable containing ["a", "b", "c"].

@return static