code: @Override
      public boolean enableImmediateResponseRead() {
          if (headersSent()) {
              if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled()) {
                  Tr.debug(tc, "Request hdrs already sent, too late for immediate read");
              }
              return false;
          }
          if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled()) {
              Tr.debug(tc, "Immediate response read requested: " + getVC());
          }
          this.bImmediateRead = true;
          return true;
      }
docs: /*
  @see com.ibm.wsspi.http.channel.outbound.HttpOutboundServiceContext#
  enableImmediateResponseRead()