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export function log$( target : any, propertyKey : string ) {
  let propertyValue;

  function getter() {
    return propertyValue;
  }

  function setter( value : any ) {
    if( value instanceof Observable ) {
      propertyValue = value.do(res => {
        const isArrayOfObjects = Array.isArray(res) && typeof res[0] === 'object';
        const logType = isArrayOfObjects ? 'table' : 'log';
        console.groupCollapsed(propertyKey);
        console[logType](res)
        console.groupEnd();
      });
    } else {
      propertyValue = value;
    }
  }

  Object.defineProperty(target, propertyKey, {
    get: getter,
    set: setter,
    enumerable: true,
    configurable: true
  });
}