@Override
        public String toString() {
            return "chunk '" + text() + "'";
        }
Splits a text into multiple chunks. The chunks should preferably contain all the content
of the original text, and can be overlapping.

@param text the text to split into chunks
@param context the context which may influence a chunker's behavior
@return the resulting chunks
@throws IllegalArgumentException if the language is not supported by this
linguistics/src/main/java/com/yahoo/language/process/Chunker.java