syntax_data: {"ast_node_type":"variable","tokens":[{"end":82,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                     let trailing_padding_needed = layout.size - field_layout.size;
context_before:                     let field = Self::from_ty(field_ty, cx)?;
context_after:                     let trailing_padding = Self::padding(trailing_padding_needed.bytes_usize());