text: export var Char = {
    ANCHOR: '&',
    COMMENT: '#',
    TAG: '!',
    DIRECTIVES_END: '-',
    DOCUMENT_END: '.'
  };
  export var Type = {
    ALIAS: 'ALIAS',
    BLANK_LINE: 'BLANK_LINE',
    BLOCK_FOLDED: 'BLOCK_FOLDED',
    BLOCK_LITERAL: 'BLOCK_LITERAL',
    COMMENT: 'COMMENT',
    DIRECTIVE: 'DIRECTIVE',
    DOCUMENT: 'DOCUMENT',
    FLOW_MAP: 'FLOW_MAP',
    FLOW_SEQ: 'FLOW_SEQ',
    MAP: 'MAP',
    MAP_KEY: 'MAP_KEY',
    MAP_VALUE: 'MAP_VALUE',
    PLAIN: 'PLAIN',
    QUOTE_DOUBLE: 'QUOTE_DOUBLE',
    QUOTE_SINGLE: 'QUOTE_SINGLE',
    SEQ: 'SEQ',
    SEQ_ITEM: 'SEQ_ITEM'
  };