syntax_data: {"ast_node_type":"other","tokens":[{"end":64,"kind":"keyword","start":0,"text":"bx:"}]}
source_snippet:         bx: reg, reg_abcd = ["bx", "ebx", "rbx"] % rbx_reserved,
context_before:         ax: reg, reg_abcd = ["ax", "eax", "rax"],
context_after:         cx: reg, reg_abcd = ["cx", "ecx", "rcx"],