Possible typo

Of course, type could not be mutable. Did you mean "data"?
Another typo

s/fields/rows/
Typo in word "Occasionally"

There is no double s in this word
Merge pull request #27 from afiskon/patch-1

Possible typo
Merge pull request #28 from afiskon/patch-2

Another typo
Merge pull request #29 from afiskon/patch-3

Typo in word "Occasionally"
typo