static SCM aligned_on_self (Grob *me, Axis a, bool pure, int start, int end);
static SCM centered_on_object (Grob *me, Axis a);
static SCM aligned_on_parent (Grob *me, Axis a);
static SCM aligned_on_self (Grob *me, Axis a, bool pure, int start, int end);
static SCM centered_on_object (Grob *me, Axis a);
static SCM aligned_on_parent (Grob *me, Axis a);