function() {
			if (this._oFilterExpression == null) {
				var oEntityType = this._oParameter.getContainingParameterization().getEntityType();
				var oModel = this._oParameter.getContainingParameterization().getTargetQueryResult().getModel();
				this._oFilterExpression = new odata4analytics.FilterExpression(oModel, oEntityType
						.getSchema(), oEntityType);
			}
			return this._oFilterExpression;
		}
function() {
			if (this._oFilterExpression == null) {
				var oEntityType = this._oParameter.getContainingParameterization().getEntityType();
				var oModel = this._oParameter.getContainingParameterization().getTargetQueryResult().getModel();
				this._oFilterExpression = new odata4analytics.FilterExpression(oModel, oEntityType
						.getSchema(), oEntityType);
			}
			return this._oFilterExpression;
		}
function ( ) { if ( this . _oFilterExpression == null ) { var oEntityType = this . _oParameter . getContainingParameterization ( ) . getEntityType ( ) ; var oModel = this . _oParameter . getContainingParameterization ( ) . getTargetQueryResult ( ) . getModel ( ) ; this . _oFilterExpression = new odata4analytics . FilterExpression ( oModel , oEntityType . getSchema ( ) , oEntityType ) ; } return this . _oFilterExpression ; }
Get the filter expression for this request.

Expressions are represented by separate objects. If none exists so far, a
new expression object gets created.

@returns {sap.ui.model.analytics.odata4analytics.FilterExpression} The filter object
associated to this request.
@public
@function
@name sap.ui.model.analytics.odata4analytics.ParameterValueSetRequest#getFilterExpression
Get the filter expression for this request .
Returns the filter expression for the parameterization