code: public static String getAnnotationColumnName(AnnotatedElement element) {
          String result = "";
          DatabaseField databaseField = element.getAnnotation(DatabaseField.class);
          if (databaseField != null) {
              result = databaseField.columnName();
              if (TextUtils.isEmpty(result)) {
                  result = ((Field) element).getName();
              }
          }
          return result;
      }
docs: Gets the column name from DatabaseField annotation. If the DatabaseField#columnName is not
  specified, returns the field name.
  @param element
  Element to be evaluated.
  @return Returns the column name.