private void appendTextTo(int level, Attributes attrs, StringBuilder sb) {
if (notAllowedAttributes != null)
appendTextTo(level, attrs, "Not allowed Attributes:", notAllowedAttributes, sb);
if (missingAttributes != null)
appendTextTo(level, attrs, "Missing Attributes:", missingAttributes, sb);
if (missingAttributeValues != null)
appendTextTo(level, attrs, "Missing Attribute Values:", missingAttributeValues, sb);
if (invalidAttributeValues != null)
appendInvalidAttributeValues(level, attrs, "Invalid Attribute Values:", sb);
}