code: public static <T extends SchematicDb> T getDb(Document document) throws RuntimeException {
          return getDb(document, Schematic.class.getClassLoader());
      }
docs: Returns a DB with the given configuration document {@code Document}. This document is expected to contain
  a {@link Schematic#TYPE_FIELD type field} to indicate the type of DB.
  
  @see #getDb(Document, ClassLoader)