t.Errorf("newly materialized symbols should not be reachable")
	}

	// ... however it should be possible to set/unset their reachability.
	ldr.SetAttrReachable(es3, true)
	if !ldr.AttrReachable(es3) {
		t.Errorf("expected reachable symbol after update")
	}
	ldr.SetAttrReachable(es3, false)
	if ldr.AttrReachable(es3) {
		t.Errorf("expected unreachable symbol after update")

  <mime-type type="application/vnd.epson.ssf">
    <glob pattern="*.ssf"/>
  </mime-type>
  <mime-type type="application/vnd.ericsson.quickcall"/>
  <mime-type type="application/vnd.eszigno3+xml">
    <glob pattern="*.es3"/>
    <glob pattern="*.et3"/>
  </mime-type>

  <mime-type type="application/vnd.etsi.asic-e+zip">
    <acronym>ASiC-E</acronym>
    <_comment>Extended Associated Signature Container</_comment>