syntax_data: {"ast_node_type":"other","tokens":[{"end":77,"kind":"keyword","start":0,"text":"\"allow"}]}
source_snippet:         "allow generating const initializers with mixed init/uninit chunks, \
context_before:     uninit_const_chunk_threshold: usize = (16, parse_number, [TRACKED],
context_after:         and set the maximum number of chunks for which this is allowed (default: 16)"),