question: this will set a list of appearances . if you would like to set the single appearance then you should use the key `` default '' , and when the pdf is written back to the filesystem then there will only be one stream . concode_field_sep COSDictionary dictionary concode_field_sep PDAppearanceEntry getRolloverAppearance concode_elem_sep void setRolloverAppearance concode_elem_sep void setRolloverAppearance concode_elem_sep PDAppearanceEntry getDownAppearance concode_elem_sep PDAppearanceEntry getNormalAppearance concode_elem_sep COSDictionary getCOSObject concode_elem_sep void setDownAppearance concode_elem_sep void setDownAppearance
target: void function ( PDAppearanceEntry arg0 ) { dictionary . setItem ( COSName . N , arg0 ) ; }