Function syn_helpers::build_implementation_over_structure

pub fn build_implementation_over_structure<'a>(
    structure: &'a DeriveInput, 
    implementing_trait: Trait, 
    structure_handler: impl Fn(String, &'a DeriveInput) -> Result<PrefixAndPostfix<Stmt>, Box<dyn Error>>, 
    field_handler: impl for<'b> Fn(String, &'b mut Fields<'a>) -> Result<Vec<Stmt>, Box<dyn Error>>
) -> TokenStream

Generates implementation for a trait over a structure