>Also worth mentioning here the shorthand way to do this:

```
gal = bulge_SED * bulge_mono + disk_SED * disk_mono
```

Altered docstring:

```
    >>> bulge_SED = user_function_to_get_bulge_spectrum()
    >>> disk_SED = user_function_to_get_disk_spectrum()
    >>> bulge_mono = galsim.DeVaucouleurs(half_light_radius=1.0)
    >>> disk_mono = galsim.Exponential(half_light_radius=2.0)
    >>> bulge = galsim.Chromatic(bulge_mono, bulge_SED)
    >>> disk = galsim.Chromatic(disk_mono, disk_SED)
    >>> gal = bulge + disk

    Some syntactic sugar for creating `Chromatic`s is to simply multiply GSObjects by SEDs.  Thus
    the last three lines above are equivalent to:

    >>> gal = bulge_mono * bulge_SED + disk_mono * disk_SED
```