@Contract("_, _ -> this")
  @Override
  default @NotNull B decoration(final @NotNull TextDecoration decoration, final boolean flag) {
    return this.decoration(decoration, TextDecoration.State.byBoolean(flag));
  }
Sets the state of a decoration on this component.

@param decoration the decoration
@param flag {@code true} if this component should have the decoration, {@code false} if
    this component should not have the decoration
@return this builder
@since 4.0.0
api/src/main/java/net/kyori/adventure/text/ComponentBuilder.java