Method subSchemas

core/src/main/java/org/apache/calcite/schema/Schema.java:77–77

Returns a lookup object to find sub schemas. @return Lookup

()

   * @return Lookup
   */
  default Lookup<? extends Schema> subSchemas() {
    return new CompatibilityLookup<>(this::getSubSchema, this::getSubSchemaNames);
  }