Called on the program root and on every statemenet
function enter(node, parent) {
    if(!node.body)return;
    for(var i = 0; i < node.body.length; i++){

      // Function to append a statement after the current statement
      var append  = [].splice.bind(node.body, i+1, 0);

      // Get all comments associated with the current statement
      var current = node.body[i];
      var comment = [].concat(current.leadingComments, current.trailingComments);

      // For every comment find the @examples and @expose tags 
      for(var j in comment){
        if(!comment[j])continue;
        var test = parseComment(comment[j], append);
        if(test)tests.push(test);
      }
    }
  }