whole_func_string: function isCandidateForContentImage( image ) {
  	if ( ! image || ! image.getAttribute( 'src' ) ) {
  		return false;
  	}
  
  	const ineligibleCandidateUrlParts = [ 'gravatar.com', '/wpcom-smileys/' ];
  
  	const imageUrl = image.getAttribute( 'src' );
  
  	const imageShouldBeExcludedFromCandidacy = some( ineligibleCandidateUrlParts, urlPart =>
  		includes( imageUrl.toLowerCase(), urlPart )
  	);
  
  	return ! ( isTrackingPixel( image ) || imageShouldBeExcludedFromCandidacy );
  }
func_code_string: function isCandidateForContentImage( image ) {
  	if ( ! image || ! image.getAttribute( 'src' ) ) {
  		return false;
  	}
  
  	const ineligibleCandidateUrlParts = [ 'gravatar.com', '/wpcom-smileys/' ];
  
  	const imageUrl = image.getAttribute( 'src' );
  
  	const imageShouldBeExcludedFromCandidacy = some( ineligibleCandidateUrlParts, urlPart =>
  		includes( imageUrl.toLowerCase(), urlPart )
  	);
  
  	return ! ( isTrackingPixel( image ) || imageShouldBeExcludedFromCandidacy );
  }
func_documentation_string: Returns true if image should be considered
  @param {Node} image - DOM node for an image
  @returns {boolean} true/false depending on if it should be included as a potential featured image