Checks the integrity and the correctness of a flow cytometry dataset by comparing the cell IDs of all existing slots to the cell IDs of the fcd$exprs$orig
     
    
    
    Arguments
- fcd
- Flow cytometry dataset to be checked. 
 
    
    Value
    If the cell IDs differ at any level from the ones of the fcd$expr$orig data frame, a warning will be returned.