A "drag tracker" object is automatically shown and moved around with the mouse. This is generally set to an icon that
represents what is being dragged. The default tracker is a 10 pixel black square, but you can customize this icon. This
dragAppearance is not recommended for use with drag resizing or drag moving.
Returns the enum constant of this type with the specified name.
The string must match exactly an identifier used to declare an
enum constant in this type. (Extraneous whitespace characters are
name - the name of the enum constant to be returned.
the enum constant with the specified name
java.lang.IllegalArgumentException - if this enum type has no constant with the specified name
java.lang.NullPointerException - if the argument is null