import { FlowType } from '../types/meta';
export declare const FLOW_TYPE: unique symbol;
export type FLOW_TYPE = typeof FLOW_TYPE;
export declare const VALUE: unique symbol;
export type VALUE = typeof VALUE;
export declare const CUSTOM_METHODS: unique symbol;
export type CUSTOM_METHODS = typeof CUSTOM_METHODS;
export declare const isFlowOfType: <T extends FlowType>(flow: unknown, type: T) => flow is {
    [FLOW_TYPE]: T;
};
export declare const isStringFlow: (flow: unknown) => flow is {
    [FLOW_TYPE]: "string";
};
export declare const isNumberFlow: (flow: unknown) => flow is {
    [FLOW_TYPE]: "number";
};
export declare const isBooleanFlow: (flow: unknown) => flow is {
    [FLOW_TYPE]: "boolean";
};
export declare const isArrayFlow: (flow: unknown) => flow is {
    [FLOW_TYPE]: "array";
};
export declare const isObjectFlow: (flow: unknown) => flow is {
    [FLOW_TYPE]: "object";
};
export declare const isErrorFlow: (flow: unknown) => flow is {
    [FLOW_TYPE]: "error";
};