Default value missing in 'Change value for "Form properties"'

The FormProperty interface contains a method definition: String getValue();. This field is missing from the popup. So you cannot assign a property with a literal.

public interface FormProperty {
/** the key used to submit the property in {@link FormService#submitStartFormData(String, java.util.Map)}
* or {@link FormService#submitTaskFormData(String, java.util.Map)} */
String getId();
/** the display label */
String getName();
/** one of the types defined in this interface like e.g. {@link #TYPE_STRING} */
FormType getType();
/** optional value that should be used to display in this property */
String getValue();
/** is this property read to be displayed in the form and made accessible with the methods
* {@link FormService#getStartFormData(String)} and {@link FormService#getTaskFormData(String)}. */
boolean isReadable();
/** is this property expected when a user submits the form? */
boolean isWritable();
/** is this property a required input field */
boolean isRequired();
}