pub fn knit(
part: &mut NamedModel,
namer: &Namer,
sheets: &[ShellId],
solid: bool,
gap: Scalar,
) -> GeopResult<Body>Expand description
Joins sheets (see the module docs), what is within gap of each
other as one, and returns what they became: a solid named namer’s
root once they close up, a sheet otherwise — an error naming the open
edges, if solid asks for one.