MarkNextChange() {
        // Only add to the list if there is something to add
        if (this.m_originalCount > 0 || this.m_modifiedCount > 0) {
            // Add the new change to our list
            this.m_changes.push(new DiffChange(this.m_originalStart, this.m_originalCount, this.m_modifiedStart, this.m_modifiedCount));
        }
        // Reset for the next change
        this.m_originalCount = 0;
        this.m_modifiedCount = 0;
        this.m_originalStart = 1073741824 /* Constants.MAX_SAFE_SMALL_INTEGER */;
        this.m_modifiedStart = 1073741824 /* Constants.MAX_SAFE_SMALL_INTEGER */;
    }
Marks the beginning of the next change in the set of differences.