public abstract boolean isSettable (S styleable)

Check to see if the corresponding property on the given Node is settable. This method is called before any styles are looked up for the given property. It is abstract so that the code can check if the property is settable without expanding the property. Generally, the property is settable if it is not null or is not bound.

Parameters:
styleable    The Styleable on which the property value is being set

Returns:  true if the property can be set.