@type t() :: %Procore.Model.RestV10ProjectsProjectIdActionPlansPlansPostRequestPlan{
  "custom_field_%{custom_field_definition_id}":
    Procore.Model.WorkOrderContractCustomFieldCustomFieldDefinitionId.t() | nil,
  description: String.t() | nil,
  location_id: integer() | nil,
  manager_id: integer() | nil,
  plan_approvers_attributes:
    [
      Procore.Model.RestV10ProjectsProjectIdActionPlansPlansPostRequestPlanPlanApproversAttributesInner.t()
    ]
    | nil,
  plan_receivers_attributes:
    [
      Procore.Model.RestV10ProjectsProjectIdActionPlansPlansPostRequestPlanPlanReceiversAttributesInner.t()
    ]
    | nil,
  plan_type_id: integer(),
  private: boolean() | nil,
  title: String.t()
}