code: public void setNamedBindings(Map<String, Object> namedBindings) {
      if (namedBindings == null) {
        throw new IllegalArgumentException("namedBindings cannot be null");
      }
      this.namedBindings = namedBindings;
    }
docs: Sets the named bindings that are needed for any named parameters in the GQL query.
  
  @param namedBindings
  the named bindings.
  @throws NullPointerException
  if the <code>namedBindings</code> argument is <code>null</code>.