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Utilities

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<!-- ##### FUNCTION tracker_sparql_escape_string ##### -->
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@literal: 
@Returns: 


<!-- ##### FUNCTION tracker_sparql_escape_uri_printf ##### -->
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@format: 
@Varargs: 
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<!-- ##### FUNCTION tracker_sparql_escape_uri_vprintf ##### -->
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@format: 
@args: 
@Returns: 


