import type { UILayer } from "../layers/UILayer/UILayer";
import type { UIExpression } from "../miscellaneous/UIExpression";
import { UISingleParameterConstraint } from "./UISingleParameterConstraint/UISingleParameterConstraint";
import type { UISingleParameterConstraintOptions } from "./UISingleParameterConstraint/UISingleParameterConstraint.Internal";
/** Constraint with custom LHS and RHS expressions */
export declare class UICustomConstraint extends UISingleParameterConstraint {
    /** Solver constraint descriptor */
    protected readonly constraint: number;
    /** Left-hand side expression */
    private lhsInternal;
    /** Right-hand side expression */
    private rhsInternal;
    /**
     * @param layer Layer containing this constraint
     * @param lhs Left-hand side expression
     * @param rhs Right-hand side expression
     * @param options Constraint configuration
     */
    constructor(layer: UILayer, lhs: UIExpression, rhs: UIExpression, options?: Partial<UISingleParameterConstraintOptions>);
    /** Left-hand side expression */
    get lhs(): UIExpression;
    /** Right-hand side expression */
    get rhs(): UIExpression;
    /** Updates left-hand side expression */
    setLHS(value: UIExpression): void;
    /** Updates right-hand side expression */
    setRHS(value: UIExpression): void;
}