public boolean isListMode() {
            return listMode;
        }
Returns true if the specified mode is a list mode (meaning
,it specifies the indices as a linear list and not some special
format).
Will return true for the types {@link #Points}, {@link #Lines} and
{@link #Triangles}.

@return true if the mode is a list type mode
jme3-core/src/main/java/com/jme3/scene/Mesh.java