public Builder mergeStackTrace(
          com.google.cloud.workflows.executions.v1.Execution.StackTrace value) {
        if (stackTraceBuilder_ == null) {
          if (((bitField0_ & 0x00000004) != 0)
              && stackTrace_ != null
              && stackTrace_
                  != com.google.cloud.workflows.executions.v1.Execution.StackTrace
                      .getDefaultInstance()) {
            getStackTraceBuilder().mergeFrom(value);
          } else {
            stackTrace_ = value;
          }
        } else {
          stackTraceBuilder_.mergeFrom(value);
        }
        if (stackTrace_ != null) {
          bitField0_ |= 0x00000004;
          onChanged();
        }
        return this;
      }
<pre>
Stack trace with detailed information of where error was generated.
</pre>

<code>.google.cloud.workflows.executions.v1.Execution.StackTrace stack_trace = 3;</code>
java-workflow-executions/proto-google-cloud-workflow-executions-v1/src/main/java/com/google/cloud/workflows/executions/v1/Execution.java