syntax_data: {"ast_node_type":"other","tokens":[{"end":82,"kind":"keyword","start":0,"text":"v15:"}]}
source_snippet:         v15: vreg, vreg_low16 = ["v15", "b15", "h15", "s15", "d15", "q15", "z15"],
context_before:         v14: vreg, vreg_low16 = ["v14", "b14", "h14", "s14", "d14", "q14", "z14"],
context_after:         v16: vreg = ["v16", "b16", "h16", "s16", "d16", "q16", "z16"] % restricted_for_arm64ec,