private void ensureSpansIsMutable() {
      if (!((bitField0_ & 0x00000002) != 0)) {
        spans_ = new java.util.ArrayList<com.google.devtools.cloudtrace.v2.Span>(spans_);
        bitField0_ |= 0x00000002;
      }
    }
<pre>
Required. The name of the project where the spans belong. The format is
`projects/[PROJECT_ID]`.
</pre>

<code>
string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
</code>

@param value The bytes for name to set.
@return This builder for chaining.
java-trace/proto-google-cloud-trace-v2/src/main/java/com/google/devtools/cloudtrace/v2/BatchWriteSpansRequest.java