public java.lang.String getProjectId() {
        java.lang.Object ref = projectId_;
        if (!(ref instanceof java.lang.String)) {
          com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
          java.lang.String s = bs.toStringUtf8();
          projectId_ = s;
          return s;
        } else {
          return (java.lang.String) ref;
        }
      }
<pre>
Project in which the subnet exists.
If not set, this project is assumed to be the project for which
the connector create request was issued.
</pre>

<code>string project_id = 2;</code>

@return The projectId.
java-vpcaccess/proto-google-cloud-vpcaccess-v1/src/main/java/com/google/cloud/vpcaccess/v1/Connector.java