fn parse_unit(input: &DeriveInput) -> Self {
    let mut model = Self::new(input);
    model.variant = SVariant::Unit;

    model
  }
/// parse data for a unit struct.
parse data for a unit struct.
parse data for a unit struct .
fn parse_unit(input: &DeriveInput) -> Self {
    let mut model = Self::new(input);
    model.variant = SVariant::Unit;
    model
  }
fn parse_unit ( input : & DeriveInput ) -> Self { let mut model = Self :: new ( input ) ; model . variant = SVariant :: Unit ; model }
parse data for a unit struct.
parse data for a unit struct .
input
&DeriveInput
input
&DeriveInput