public RunnerBuilder natMethodFallbackEnabled(final boolean natMethodFallbackEnabled) {
    this.natMethodFallbackEnabled = natMethodFallbackEnabled;
    return this;
  }
Enable Nat method fallback.

@param natMethodFallbackEnabled the nat method fallback enabled
@return the runner builder
app/src/main/java/org/hyperledger/besu/RunnerBuilder.java