pub fn instances<'a>(
reader: &Reader<'a>,
) -> GeopResult<Vec<(&'a str, &'a Instance)>>Expand description
Every instance placed in the part reader reads — not in its
instances’ parts — by name, in the order the steps placed their parts
(geop_core_program::reader::Reader::instances), each read recorded.
An instance whose part is placed must be defined: it is an error if it
is not.