code: public Field loadClassAndGetField() throws IllegalArgumentException {
          try {
              return loadClass().getField(getName());
          } catch (final NoSuchFieldException e1) {
              try {
                  return loadClass().getDeclaredField(getName());
              } catch (final NoSuchFieldException e2) {
                  throw new IllegalArgumentException("No such field: " + getClassName() + "." + getName());
              }
          }
      }
docs: Load the class this field is associated with, and get the {@link Field} reference for this field.
  
  @return The {@link Field} reference for this field.
  @throws IllegalArgumentException
  if the field does not exist.