code: func (c *Client) DynoCreate(appIdentity string, command string, options *DynoCreateOpts) (*Dyno, error) {
  	params := struct {
  		Command string             `json:"command"`
  		Attach  *bool              `json:"attach,omitempty"`
  		Env     *map[string]string `json:"env,omitempty"`
  		Size    *string            `json:"size,omitempty"`
  	}{
  		Command: command,
  	}
  	if options != nil {
  		params.Attach = options.Attach
  		params.Env = options.Env
  		params.Size = options.Size
  	}
  
  	rh := RequestHeaders{CommitMessage: options.Message}
  	var dynoRes Dyno
  	return &dynoRes, c.PostWithHeaders(&dynoRes, "/apps/"+appIdentity+"/dynos", params, rh.Headers())
  }
docs: // Create a new dyno.
  //
  // appIdentity is the unique identifier of the Dyno's App. command is the
  // command used to start this process. options is the struct of optional
  // parameters for this action.