public Builder<T> unaryOperators(final Predicate<? super T> ops) {
			_uops = requireNonNull(ops);
			return this;
		}
Set the predicate which defines the unary operator tokens. If the
given predicate returns {@code true} for a token, it is treated as
unary operator.

@param ops the {@code comma} token
@return {@code this} builder, for method chaining
@throws NullPointerException if the {@code ops} is {@code null}
jenetics.ext/src/main/java/io/jenetics/ext/internal/util/FormulaParser.java