@property<EOL><INDENT>def format_tags(self):<DEDENT>
tags = VcfRecord._EMPTY_SET<EOL>if self.sample_tag_values:<EOL><INDENT>first_sample = list(self.sample_tag_values.keys())[<NUM_LIT:0>]<EOL>tags = set(self.sample_tag_values[first_sample].keys())<EOL><DEDENT>return tags<EOL>
Returns set of format tags.