syntax_data: {"ast_node_type":"other","tokens":[{"end":67,"kind":"keyword","start":0,"text":"\"make"}]}
source_snippet:         "make the x18 register reserved on AArch64 (default: no)"),
context_before:     fixed_x18: bool = (false, parse_bool, [TRACKED TARGET_MODIFIER],
context_after:     flatten_format_args: bool = (true, parse_bool, [TRACKED],