You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: utils.rs
    path of file: ./repos/fuels-rs/packages/fuels-code-gen/src/program_bindings/custom_types
    
    the code of the file until where you have to start completion: use fuel_abi_types::{
    abi::full_program::FullTypeDeclaration,
    utils::{self, extract_generic_name},
};
use proc_macro2::Ident;

/// Returns a vector of TokenStreams, one for each of the generic parameters
/// used by the given type.
pub(crate) fn extract_generic_parameters(type_decl: &FullTypeDeclaration) -> Vec<Ident> {
   
    
pub(crate) fn extract_generic_parameters(type_decl: &FullTypeDeclaration) -> Vec<Ident> {
    type_decl
        .type_parameters
        .iter()
        .map(|decl| {
            let name = extract_generic_name(&decl.type_field).unwrap_or_else(|| {
                panic!("Type parameters should only contain ids of generic types!")
            });
            utils::ident(&name)
        })
        .collect()
}