Usage
    # S3 method for timespan
vec_cast(x, to, ...)
 
    
    Arguments
    - x
- Vectors to cast. 
- to
- Type to cast to. If - NULL,- xwill be returned as is.
 
- ...
- For - vec_cast_common(), vectors to cast. For- vec_cast(),- vec_cast_default(), and- vec_restore(), these
dots are only for future extensions and should be empty.
 
 
    
    Value
    
A partial_timespan vector