question: this will get the subject of the document . this will return null if no subject exists . concode_field_sep COSDictionary info concode_field_sep void setModificationDate concode_elem_sep void setSubject concode_elem_sep Object getPropertyStringValue concode_elem_sep String getAuthor concode_elem_sep void setTrapped concode_elem_sep String getCustomMetadataValue concode_elem_sep void setCreator concode_elem_sep String getKeywords concode_elem_sep void setTitle concode_elem_sep COSDictionary getDictionary concode_elem_sep void setProducer concode_elem_sep void setKeywords concode_elem_sep String getCreator concode_elem_sep String getProducer concode_elem_sep void setCustomMetadataValue concode_elem_sep Calendar getCreationDate concode_elem_sep Calendar getModificationDate concode_elem_sep String getTitle concode_elem_sep void setCreationDate concode_elem_sep void setAuthor concode_elem_sep String getTrapped concode_elem_sep COSBase getCOSObject concode_elem_sep Set<String> getMetadataKeys
target: String function ( ) { return info . getString ( COSName . SUBJECT ) ; }