(PECL solr >= 0.9.2)
  	
    
      
      Merges source to the current SolrDocument
    
    
      
      public bool SolrDocument::merge ( SolrDocument $sourceDoc [, bool $overwrite = true  ] )
    
    
    
    Merges source to the current SolrDocument.
Parameters: 
  
      
      
      	sourceDoc
    	
 
    	The source document.
      	overwrite
    	
 
    	 If this is TRUE then fields with the same name in the destination document will be overwritten. 
Returns: 
     Returns TRUE on success or FALSE on failure. 
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