syntax_data: {"ast_node_type":"other","tokens":[{"end":56,"kind":"keyword","start":0,"text":"binding_mode_count:"}]}
source_snippet:             binding_mode_count: self.binding_mode_count,
context_before:             ref_pattern_count: self.ref_pattern_count,
context_after:             default_mode_labels: self.default_mode_labels,