pub trait SolidElements<C, F, const G: usize, const M: usize, const N: usize, const P: usize>where
F: SolidFiniteElement<G, M, N, P>,{
// Required method
fn deformation_gradients(
&self,
nodal_coordinates: &NodalCoordinates<3>,
) -> Vec<DeformationGradientList<G>> ⓘ;
}