try_has_tag
  
  Description:
  [ 
Version ( since = 
"0.14.0" ) ]
public bool try_has_tag (
string tag) 
throws Error
  
    The Exiv2 Tag Reference can be found at <ulink url="http://exiv2.
    org/metadata.html"></ulink>
    Parameters:
    
      
        | this | An instance of Metadata | 
      
        | tag | Exiv2 tag | 
    
    Returns:
    
      
        | TRUE if the tag is present. |