code: void mapInVal(Object val, Object to, String to_in) {
          if (val == null) {
              throw new ComponentException("Null value for " + name(to, to_in));
          }
          if (to == ca.getComponent()) {
              throw new ComponentException("field and component ar ethe same for mapping :" + to_in);
          }
          ComponentAccess ca_to = lookup(to);
          Access to_access = ca_to.input(to_in);
          checkFA(to_access, to, to_in);
          ca_to.setInput(to_in, new FieldValueAccess(to_access, val));
          if (log.isLoggable(Level.CONFIG)) {
              log.config(String.format("Value(%s) -> @In(%s)", val.toString(), to_access.toString()));
          }
      }
docs: Directly map a value to a input field.
  
  @param val
  @param to
  @param to_in