Function EN_getnodeindex 

pub unsafe extern "C" fn EN_getnodeindex(
    ph: EN_Project,
    id: *const c_char,
    out_index: *mut c_int,
) -> c_int

@brief Gets the index of a node given its ID name. @param ph an EPANET project handle. @param id a node ID name. @param[out] out_index the node’s index (starting from 1). @return an error code