public AxisSpace getFixedDomainAxisSpace() {
        return this.fixedDomainAxisSpace;
    }

    /**
     * Sets the fixed domain axis space and sends a {@link PlotChangeEvent} to
     * all registered listeners.
     *
     * @param space  the space (<code>null</code> permitted).
     *
     * @see #getFixedDomainAxisSpace()
     */
    public void setFixedDomainAxisSpace(AxisSpace space) {
        setFixedDomainAxisSpace(space, true);
    }

    /**
     * Sets the fixed domain axis space and sends a {@link PlotChangeEvent} to
     * all registered listeners.
     *
     * @param space  the space (<code>null</code> permitted).
     * @param notify  notify listeners?
     *
     * @see #getFixedDomainAxisSpace()
     *
     * @since 1.0.7
     */
    public void setFixedDomainAxisSpace(AxisSpace space, boolean notify) {
        this.fixedDomainAxisSpace = space;
        if (notify) {
            fireChangeEvent();
        }
    }

    /**
     * Returns the fixed range axis space.
     *
     * @return The fixed range axis space (possibly <code>null</code>).
     *
     * @see #setFixedRangeAxisSpace(AxisSpace)
     */
    public AxisSpace getFixedRangeAxisSpace() {
        return this.fixedRangeAxisSpace;
    }

    /**
     * Sets the fixed range axis space and sends a {@link PlotChangeEvent} to
     * all registered listeners.
     *
     * @param space  the space (<code>null</code> permitted).
     *
     * @see #getFixedRangeAxisSpace()
     */
    public void setFixedRangeAxisSpace(AxisSpace space) {
        setFixedRangeAxisSpace(space, true);
    }

    /**
     * Sets the fixed range axis space and sends a {@link PlotChangeEvent} to
     * all registered listeners.
     *
     * @param space  the space (<code>null</code> permitted).
     * @param notify  notify listeners?
     *
     * @see #getFixedRangeAxisSpace()
     *
     * @since 1.0.7
     */
    public void setFixedRangeAxisSpace(AxisSpace space, boolean notify) {
        this.fixedRangeAxisSpace = space;
        if (notify) {
            fireChangeEvent();