SubStatement Validation about yang-lsp HOT 3 CLOSED

module xt8 {
  prefix x;
  namespace ["urn:test:xt8"](Substatement 'namespace' must be declared before 'prefix'.);
...

xt8.yang:2: error: keyword "prefix" not in canonical order,expected "namespace", (See RFC 6020, Section 12)
xt8.yang:3: error: keyword "namespace" not in canonical order, (See RFC 6020, Section 12)

module-header-stmts = ;; these stmts can appear in any order
                         [yang-version-stmt stmtsep]
                          namespace-stmt stmtsep
                          prefix-stmt stmtsep