SolrQuery::getFacetDateStart
  Returns the  lower bound for the first date range for all date faceting on this field
  
 
  Description
  
   public string SolrQuery::getFacetDateStart
    ([ string $field_override
  ] )
  
  
 
  Parameters
  
   
    
     - 
field_override
- 
      
       The name of the field
       
 
 
  Return Values
  
Returns a string on success and NULL if not set