Function ndarray_einsum_beta::validate_and_size_from_shapes

pub fn validate_and_size_from_shapes(
    input_string: &str, 
    operand_shapes: &[Vec<usize>]
) -> Result<SizedContraction, &'static str>

Only included so the function can be called from WASM, i.e. without arguments that are already ndarray ArrayBases.