private com.google.protobuf.MapField<java.lang.String, java.lang.String>
        internalGetMutableUserEnvVars() {
      if (userEnvVars_ == null) {
        userEnvVars_ =
            com.google.protobuf.MapField.newMapField(UserEnvVarsDefaultEntryHolder.defaultEntry);
      }
      if (!userEnvVars_.isMutable()) {
        userEnvVars_ = userEnvVars_.copy();
      }
      bitField0_ |= 0x00002000;
      onChanged();
      return userEnvVars_;
    }
<pre>
Optional. Describes the level of platform logging to apply to calls and
call responses during executions of this workflow. If both the workflow and
the execution specify a logging level, the execution level takes
precedence.
</pre>

<code>
.google.cloud.workflows.v1.Workflow.CallLogLevel call_log_level = 13 [(.google.api.field_behavior) = OPTIONAL];
</code>

@return This builder for chaining.
java-workflows/proto-google-cloud-workflows-v1/src/main/java/com/google/cloud/workflows/v1/Workflow.java