text: #import "GPUImageFilterGroup.h"
  #import "GPUImageBuffer.h"
  #import "GPUImageDissolveBlendFilter.h"
  
  @interface GPUImageLowPassFilter : GPUImageFilterGroup
  {
      GPUImageBuffer *bufferFilter;
      GPUImageDissolveBlendFilter *dissolveBlendFilter;
  }
  
  // This controls the degree by which the previous accumulated frames are blended with the current one. This ranges from 0.0 to 1.0, with a default of 0.5.
  @property(readwrite, nonatomic) GLfloat filterStrength;
  
  @end
  