Function proj_sys::proj_coordoperation_get_param

pub unsafe extern "C" fn proj_coordoperation_get_param(
    ctx: *mut PJ_CONTEXT, 
    coordoperation: *const PJ, 
    index: c_int, 
    out_name: *mut *const c_char, 
    out_auth_name: *mut *const c_char, 
    out_code: *mut *const c_char, 
    out_value: *mut f64, 
    out_value_string: *mut *const c_char, 
    out_unit_conv_factor: *mut f64, 
    out_unit_name: *mut *const c_char, 
    out_unit_auth_name: *mut *const c_char, 
    out_unit_code: *mut *const c_char, 
    out_unit_category: *mut *const c_char
) -> c_int