jelly-tags/swt/src/main/java/org/apache/commons/jelly/tags/swt/ColorTag.java [60:110]:
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    public void setVar(final String var) {
        this.var = var;
    }

    /**
     * Obtain the variable name.
     *
     * @return the variable name of this {@link Color} instance
     */
    public String getVar() {
        return this.var;
    }

    /**
     * @return the parent widget which this widget will be added to.
     */
    public Widget getParentWidget() {
        final WidgetTag tag = (WidgetTag) findAncestorWithClass(WidgetTag.class);
        if (tag != null) {
            return tag.getWidget();
        }
        return null;
    }

    // Tag interface
    //-------------------------------------------------------------------------

    /**
     * Creates a {@link Color} instance as defined by the RGB attribute.
     * Stores this {@link Color} instance in the Context so that it can be
     * referenced in the Jelly script.
     *
     * @param output {@link XMLOutput} reference
     * @throws JellyTagException if an error occurs
     * @see org.apache.commons.jelly.Tag#doTag(org.apache.commons.jelly.XMLOutput)
     */
    @Override
    public void doTag(final XMLOutput output) throws JellyTagException {
        // invoke by body just in case some nested tag configures me
        invokeBody(output);

        final Widget parent = getParentWidget();

        if (parent == null) {
            throw new JellyTagException(
                "This tag must be nested within a Widget or a Window"
            );
        }

        if (var == null) {
            throw new JellyTagException("This tag requires a context variable name");
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jelly-tags/swt/src/main/java/org/apache/commons/jelly/tags/swt/FontTag.java [109:159]:
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    public void setVar(final String var) {
        this.var = var;
    }

    /**
     * Obtain the variable name.
     *
     * @return the variable name of this {@link Font} instance
     */
    public String getVar() {
        return this.var;
    }

    /**
     * @return the parent widget which will deliver us a {@link Device} reference
     */
    public Widget getParentWidget() {
        final WidgetTag tag = (WidgetTag) findAncestorWithClass(WidgetTag.class);
        if (tag != null) {
            return tag.getWidget();
        }
        return null;
    }

    // Tag interface
    //-------------------------------------------------------------------------

    /**
     * Creates a {@link Font} instance as defined by the type, size and style
     * attributes, and stores this {@link Font} instance in the Context so that
     * it can be referenced in the Jelly script.
     *
     * @param output {@link XMLOutput} reference
     * @throws JellyTagException if an error occurs
     * @see org.apache.commons.jelly.Tag#doTag(org.apache.commons.jelly.XMLOutput)
     */
    @Override
    public void doTag(final XMLOutput output) throws JellyTagException {
        // invoke by body just in case some nested tag configures me
        invokeBody(output);

        final Widget parent = getParentWidget();

        if (parent == null) {
            throw new JellyTagException(
                "This tag must be nested within a Widget or a Window"
            );
        }

        if (var == null) {
            throw new JellyTagException("This tag requires a context variable name");
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