original_string: protected function createCoreXmlFile()
      {
          $createdDate = (new \DateTime())->format(\DateTime::W3C);
          $coreXmlFileContents = <<<EOD
  <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
  <cp:coreProperties xmlns:cp="http://schemas.openxmlformats.org/package/2006/metadata/core-properties" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcmitype="http://purl.org/dc/dcmitype/" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
      <dcterms:created xsi:type="dcterms:W3CDTF">$createdDate</dcterms:created>
      <dcterms:modified xsi:type="dcterms:W3CDTF">$createdDate</dcterms:modified>
      <cp:revision>0</cp:revision>
  </cp:coreProperties>
  EOD;
  
          $this->createFileWithContents($this->docPropsFolder, self::CORE_XML_FILE_NAME, $coreXmlFileContents);
  
          return $this;
      }
code: protected function createCoreXmlFile()
      {
          $createdDate = (new \DateTime())->format(\DateTime::W3C);
          $coreXmlFileContents = <<<EOD
  <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
  <cp:coreProperties xmlns:cp="http://schemas.openxmlformats.org/package/2006/metadata/core-properties" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcmitype="http://purl.org/dc/dcmitype/" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
      <dcterms:created xsi:type="dcterms:W3CDTF">$createdDate</dcterms:created>
      <dcterms:modified xsi:type="dcterms:W3CDTF">$createdDate</dcterms:modified>
      <cp:revision>0</cp:revision>
  </cp:coreProperties>
  EOD;
  
          $this->createFileWithContents($this->docPropsFolder, self::CORE_XML_FILE_NAME, $coreXmlFileContents);
  
          return $this;
      }
code_tokens: protected function createCoreXmlFile ( ) { $ createdDate = ( new \ DateTime ( ) ) -> format ( \ DateTime :: W3C ) ; $ coreXmlFileContents =  <<<EOD
  <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
  <cp:coreProperties xmlns:cp="http://schemas.openxmlformats.org/package/2006/metadata/core-properties" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcmitype="http://purl.org/dc/dcmitype/" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
      <dcterms:created xsi:type="dcterms:W3CDTF">$createdDate</dcterms:created>
      <dcterms:modified xsi:type="dcterms:W3CDTF">$createdDate</dcterms:modified>
      <cp:revision>0</cp:revision>
  </cp:coreProperties>
  EOD ; $ this -> createFileWithContents ( $ this -> docPropsFolder , self :: CORE_XML_FILE_NAME , $ coreXmlFileContents ) ; return $ this ; }
docstring: Creates the "core.xml" file under the "docProps" folder
  
  @return FileSystemHelper
  @throws \Box\Spout\Common\Exception\IOException If unable to create the file
docstring_tokens: Creates the core . xml file under the docProps folder