/** Which store an action is allowed to write. */
export type MutationDomain = 'semantic' | 'layout' | 'neither';
/** Payload keys that only ever describe presentation. */
export declare const LAYOUT_ONLY_FIELDS: readonly string[];
export declare function mutationDomain(messageType: string): MutationDomain;
/** A mutation carrying data from a domain it is not allowed to write. */
export declare class MixedMutationDomainError extends Error {
    readonly messageType: string;
    readonly offendingFields: readonly string[];
    constructor(messageType: string, offendingFields: readonly string[]);
}
/**
 * Refuse a semantic mutation that also carries layout data.
 *
 * The check runs on the payload rather than trusting the caller, because the
 * mixture arrives from a client: a properties panel that happened to spread a
 * node object into its save request would otherwise write a canvas position
 * into `.sysml` as an ordinary attribute, and nothing downstream would tell it
 * apart from a modelled one.
 */
export declare function assertSingleDomainMutation(messageType: string, payload: unknown): void;
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