private boolean decodeCreateNonExistingCells(byte operationId) {
        byte CREATE_FLAG = -0b10000000;
        return (operationId & CREATE_FLAG) != 0;
    }
Class used for de-serializing documents on the current head document format.

@author baldersheim
document/src/main/java/com/yahoo/document/serialization/VespaDocumentDeserializerHead.java