code: function blockEncloses(
    addr: number,
    size: number,
    encBlock: number,
    encSize: number
  ): boolean {
    return addr >= encBlock && addr + size <= encBlock + encSize;
  }
docs: Tests if a block encloses another block
  
  @param {int} addr      - child block
  @param {int} size
  @param {int} encBlock - address of the potentially enclosing block being tested
  @param {int} encSize  - size of the potentially enclosing block being tested
  @returns {Boolean}