GlobalVarDecl

    pub const GlobalVarDecl = struct {
        /// Populated if there is an explicit type ascription.
        type_node: OptionalIndex,
        /// Populated if align(A) is present.
        align_node: OptionalIndex,
        /// Populated if addrspace(A) is present.
        addrspace_node: OptionalIndex,
        /// Populated if linksection(A) is present.
        section_node: OptionalIndex,
    }