@Override
    public void read(JmeImporter importer) throws IOException {
        InputCapsule cap = importer.getCapsule(this);
        m00 = cap.readFloat("m00", 1);
        m01 = cap.readFloat("m01", 0);
        m02 = cap.readFloat("m02", 0);
        m10 = cap.readFloat("m10", 0);
        m11 = cap.readFloat("m11", 1);
        m12 = cap.readFloat("m12", 0);
        m20 = cap.readFloat("m20", 0);
        m21 = cap.readFloat("m21", 0);
        m22 = cap.readFloat("m22", 1);
    }
De-serializes from the specified importer, for example when loading from a
J3O file.

@param importer the importer to use (not null)
@throws IOException from the importer
jme3-core/src/main/java/com/jme3/math/Matrix3f.java