public Builder mergePosition(
          com.google.cloud.workflows.executions.v1.Execution.StackTraceElement.Position value) {
        if (positionBuilder_ == null) {
          if (((bitField0_ & 0x00000004) != 0)
              && position_ != null
              && position_
                  != com.google.cloud.workflows.executions.v1.Execution.StackTraceElement.Position
                      .getDefaultInstance()) {
            getPositionBuilder().mergeFrom(value);
          } else {
            position_ = value;
          }
        } else {
          positionBuilder_.mergeFrom(value);
        }
        if (position_ != null) {
          bitField0_ |= 0x00000004;
          onChanged();
        }
        return this;
      }
<pre>
The source position information of the stack trace element.
</pre>

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