Parameters
    $key - The element key.
    $throwError - Indicates if an error should be thrown if the key is not found.
    
    Returns
    
    
      The object with the matching key value.
    
    
    Syntax
    
    
      
        
          | PHP | 
          
            | 
              public function Retrieve($key, bool $throwError = true) : ?LJCDocDataParam
             | 
          
        
      
     
    
    
      Retrieves the item by Key value.
    
    
    
      Copyright © Lester J. Clark and Contributors.
      Licensed under the MIT License.