Function additional_accounts_request::call_preflight_interface_function

pub fn call_preflight_interface_function<'info, T: ToAccountInfos<'info> + ToAccountMetas>(
    function_name: String,
    ctx: &CpiContext<'_, '_, '_, 'info, T>,
    args: &[u8]
) -> Result<()>

This calls the preflight function on the target program (defined on the ctx)