Constant dfir_lang::graph::ops::IDENTITY_WRITE_FN

pub const IDENTITY_WRITE_FN: WriteFn = _; // {<{closure@dfir_lang/src/graph/ops/mod.rs:180:40: 180:63} as std::ops::FnOnce<(&graph::ops::WriteContextArgs<'_>, &mut std::vec::Vec<diagnostic::Diagnostic>)>>::call_once as for<'a, 'b, 'c> fn(&'a graph::ops::WriteContextArgs<'b>, &'c mut std::vec::Vec<diagnostic::Diagnostic>) -> std::result::Result<graph::ops::OperatorWriteOutput, ()>}

OperatorConstraints::write_fn for unary identity operators.