How to check Sitecore item presentation details

Sometimes; I've to find out whether a given Sitecore item has presentation details set or not. I've to write business logic that depends if Sitecore item has any layout associated with it. I've written a function DoesItemHasPresentationDetails(string itemId) which takes Sitecore item id and returns true/false based on Sitecore Item presentation details.

public bool DoesItemHasPresentationDetails(string itemId)
        {
            if (Sitecore.Data.ID.IsID(itemId))
            {
                Item item = Sitecore.Context.Database.GetItem(Sitecore.Data.ID.Parse(itemId));
                if (item != null)
                {
                    return item.Fields[Sitecore.FieldIDs.LayoutField] != null
                           && !String.IsNullOrEmpty(item.Fields[Sitecore.FieldIDs.LayoutField].Value);
                }
            }
            return false;
        }

Code explanation:

• Sitecore.Data.ID.IsID() : This method takes in a string guid and returns true if it's a valid guid in Sitecore . The string must be 38 characters long, start with a curly brace "{" and end with a curly brace "}".
  For example :
  string itemId = "{AD1495DB-36FC-4B7A-80B6-D6170AB7F3B1}";
• Sitecore.Data.ID.Parse() : This method takes in a string guid and returns a Sitecore ID object.
• Sitecore.Context.Database.GetItem() : This method takes in a Sitecore ID object and return a Sitecore Item object.
• Sitecore.FieldIDs.LayoutField : Sitecore.FieldIDs.LayoutField is a constant that hold the value of the __Renderings field ID.

Above function will return true if presentation details has been set like below image:

Above function will return false if presentation details has been set like below image (no layout):

Alternatively, you can use DoesItemHasLayout(string itemId) function to check whether Sitecore item has layout associated with it or not. This function takes Sitecore item id and returns true/false.

public bool DoesItemHasLayout(string itemId)
        {           
            if (Sitecore.Data.ID.IsID(itemId))
            {
                Item item = Sitecore.Context.Database.GetItem(Sitecore.Data.ID.Parse(itemId));
                if (item != null)
                {
                    LayoutItem layoutItem = item.Visualization.GetLayout(Sitecore.Context.Device);
                    if(layoutItem!=null)
                    {
                        return true;
                    }
                }
            }
            return false;
        }    

Comments and suggestions are most welcome. Happy coding!