ngx-echarts
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TypeScript
import { SimpleChanges } from '@angular/core';
import { Observable } from 'rxjs';
export declare class ChangeFilter {
private changes;
constructor(changes: SimpleChanges);
static of(changes: SimpleChanges): ChangeFilter;
notEmpty<T>(key: string): Observable<T>;
has<T>(key: string): Observable<T>;
notFirst<T>(key: string): Observable<T>;
notFirstAndEmpty<T>(key: string): Observable<T>;
}