Returns List of FunctionImports valid for the appropriate collection. 
      Syntax
         
         
            public 
            abstract List< IODataFunctionImport >  
            getFunctionImportsForCollection
            (
            String 
            collectionId
            )
         
      
      Parameters
         
         
            - 
               collectionId – 
               The href of the appropriate collection.
            
 
         
       
      Returns
         List of FunctionImports valid for the appropriate collection.