| Alphas | A list of color stops, which should be ordered by time |
| Blending | The blend mode |
| Colors | A list of color stops, which should be ordered by time |
| Item |
| AddAlpha | |
| AddColor | |
| Evaluate | |
| FixOrder | If the lists aren't in time order for some reason, this will fix them. This should really just be called when serializing, and in every other situation we should assume they're okay. |
| WithFrames |