Detect if the tables/key can be automatically retrieve
     
    
    Usage
    detect_from(stcs, .var)
detect_by(stcs, .var, from = NULL)
 
    
    Arguments
- stcs
- A list containing the STCS data frame. 
- .var
- chr. The name of variables to add. 
- from
- chr. The name of the dataset (optional) 
 
    
    Value
    A data frame with the new column.