question: set the value of the ref . concode_field_sep String startPage concode_elem_sep boolean published concode_elem_sep List<Author> editorList concode_elem_sep List<Author> authorList concode_elem_sep long serialVersionUID concode_elem_sep String title concode_elem_sep String ref concode_elem_sep String doi concode_elem_sep String volume concode_elem_sep String refn concode_elem_sep String pmid concode_elem_sep int publicationDate concode_elem_sep String journalName concode_elem_sep String publisher concode_field_sep String getDoi concode_elem_sep int getPublicationDate concode_elem_sep String getPmid concode_elem_sep String getVolume concode_elem_sep String getTitle concode_elem_sep void setPmid concode_elem_sep String getRef concode_elem_sep List<Author> getEditorList concode_elem_sep String getStartPage concode_elem_sep String getJournalName concode_elem_sep void setStartPage concode_elem_sep void setIsPublished concode_elem_sep boolean isPublished concode_elem_sep void setPublicationDate concode_elem_sep void setTitle concode_elem_sep void setPublished concode_elem_sep void setVolume concode_elem_sep void setAuthorList concode_elem_sep void setEditorList concode_elem_sep void setRefn concode_elem_sep String getRefn concode_elem_sep String getPublisher concode_elem_sep String toString concode_elem_sep void setJournalName concode_elem_sep void setPublisher concode_elem_sep void setDoi concode_elem_sep List<Author> getAuthorList
target: void function ( String arg0 ) { this . ref = arg0 ; }