set flag debugComponentMeta.

svoid testMetaOfJComponent() {
  JLabel l = jlabel("bla");
  metaPut(l, I := "am God");
  assertEqualsVerbose(metaGet I(l), "am God");
  metaPut(l, You := "are me");
  assertEqualsVerbose(metaGet I(l), "am God");
  assertEqualsVerbose(metaGet You(l), "are me");
  assertEqualsVerbose(metaGet Unknown(l), null);
}