Method has_mesh

perro_source/render_stack/perro_graphics/src/resources.rs:656–658

(&self, id: MeshID)

            }
            self.purge_stale_material_source(source, id);
        }
        let (index, generation) = self.materials.create_parts();
        let id = MaterialID::from_parts(index, generation);
        self.material_by.insert(id, material);
        self.material_revision = self.material_revision.wrapping_add(1);
        if let Some(source) = source {