struct KeyFrame has the requirement of the value type to be Copy.
pub fn value(&self) -> T where T: Copy { self.value }
It seems that the library is attempting to allow Vec types as a value type, and Vec does not implement Copy, but it does implement Clone, so the where T: Copy should be changed to where T: Clone. There are a few places where an explicit .clone() call must be made to make this change work, but would allow Vec to be used.
struct KeyFramehas the requirement of thevaluetype to beCopy.It seems that the library is attempting to allow
Vectypes as avaluetype, andVecdoes not implementCopy, but it does implementClone, so thewhere T: Copyshould be changed towhere T: Clone. There are a few places where an explicit.clone()call must be made to make this change work, but would allow Vec to be used.