parse(context, start) {
      this.context = context;
      const {
        src
      } = context;
      let offset = start + 1;

      while (_Node.default.atBlank(src, offset)) {
        const lineEnd = _Node.default.endOfWhiteSpace(src, offset);

        if (lineEnd === '\n') offset = lineEnd + 1;else break;
      }

      this.range = new _Range.default(start, offset);
      return offset;
    }
Parses blank lines from the source

@param {ParseContext} context
@param {number} start - Index of first \n character
@returns {number} - Index of the character after this