Method cursor

Nom_Fits/src/main/java/nom/tam/fits/Header.java:1843–1845

Return the iterator that represents the current position in the header. This provides a connection between editing headers through Header add/append/update methods, and via Cursors, which can be used side-by-side while maintaining desired card ordering. For the reverse direction ( translating iterat

()

     * @see    #iterator()
     */
    private Cursor<String, HeaderCard> cursor() {
        return cards.cursor();
    }

    /**
     * Move the cursor to the end of the header. Subsequently, all <code>addValue()</code> calls will add new cards to