code: public ListAccessKeysResult withAccessKeyMetadata(AccessKeyMetadata... accessKeyMetadata) {
          if (this.accessKeyMetadata == null) {
              setAccessKeyMetadata(new com.amazonaws.internal.SdkInternalList<AccessKeyMetadata>(accessKeyMetadata.length));
          }
          for (AccessKeyMetadata ele : accessKeyMetadata) {
              this.accessKeyMetadata.add(ele);
          }
          return this;
      }
docs: <p>
  A list of objects containing metadata about the access keys.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setAccessKeyMetadata(java.util.Collection)} or {@link #withAccessKeyMetadata(java.util.Collection)} if
  you want to override the existing values.
  </p>
  
  @param accessKeyMetadata
  A list of objects containing metadata about the access keys.
  @return Returns a reference to this object so that method calls can be chained together.