public final boolean isPrecedenceDfa() {
		return precedenceDfa;
	}
Gets whether this DFA is a precedence DFA. Precedence DFAs use a special
start state {@link #s0} which is not stored in {@link #states}. The
{@link DFAState#edges} array for this start state contains outgoing edges
supplying individual start states corresponding to specific precedence
values.

@return {@code true} if this is a precedence DFA; otherwise,
{@code false}.
@see Parser#getPrecedence()
runtime/Java/src/org/antlr/v4/runtime/dfa/DFA.java