code: public UpdateBranchRequest withEnvironmentVariables(java.util.Map<String, String> environmentVariables) {
          setEnvironmentVariables(environmentVariables);
          return this;
      }
docs: <p>
  Environment Variables for the branch.
  </p>
  
  @param environmentVariables
  Environment Variables for the branch.
  @return Returns a reference to this object so that method calls can be chained together.