In fcl-passrc, TPasElement.GetDeclaration does not display label declarations

TPasElement.GetDeclaration does not display label declarations. This happens because

function TPasLabels.GetDeclaration(full: Boolean): TPasTreeString;

is not implemented.

For example, with the following program:

program Prog;
{$mode ObjFpc}

label
  Label1, Label2;

begin
end.

It does not produce any output.

See attached zip archive to reproduce.

test.zip