Given the identifier of a member of the data package, return the DataObject
representation of the member.
     
    
    Usage
    getMember(x, ...)
# S4 method for class 'DataPackage'
getMember(x, identifier)
 
     
    
    Arguments
- x
 
A DataPackage instance
 
- ...
 
(Not yet used)
 
- identifier
 
A DataObject identifier
 
 
    
    Value
    A DataObject if the member is found, or NULL if not
     
    
    
    Examples
    dp <- new("DataPackage")
data <- charToRaw("1,2,3\n4,5,6")
do <- new("DataObject", id="myNewId", dataobj=data, format="text/csv", user="jsmith")
dp <- addMember(dp, do)
do2 <- getMember(dp, "myNewId")