pub fn hg_hyperbolic_distance(
gtype: HgGraphType,
node1: &HgCoordinateType,
node2: &HgCoordinateType,
zeta_eta: f64
) -> f64
pub fn hg_hyperbolic_distance(
gtype: HgGraphType,
node1: &HgCoordinateType,
node2: &HgCoordinateType,
zeta_eta: f64
) -> f64