code: function collectDeclarations (filePath) {
      const declarationRegexp = /(?:\$)([\w-]+)(?:[\s\n\r\t])*(?::)(?:[\s\n\r\t])*(.+)(?:[\s\n\r\t])*(?:;)/gm;
      const fileSource = fs.readFileSync(filePath, 'utf8');
  
      return fileSource.match(declarationRegexp);
  }
docs: Parses file
  Returns declarations array
  @param filePath
  @returns {Array|{index: number, input: string}|*|Array}