maybe there has a problem with StringColumn calcu byteSize

I'm interested in calculating the object byteSize , then i notice StringColumn calcu the byteSize by string.length() method. but the string byteSize relate to String encoding, not string.length().

Locate StringColumn and inspect its current string.length()-based byteSize calculation. Determine which String encoding the project expects, then define a regression check using non-ASCII text; done means StringColumn reports the expected encoded byte size rather than character count.

Written by the indexing model from the issue text.