Search for a text property as specified with {props}: id property with this ID type property with this type name both "id" and "type" must both match bufnr buffer to search in; when present a start position with "lnum" and "col" must be given; when omitted the current buffer is used lnum start in this line (when omitted start at the cursor) col start at this column (when omitted and "lnum" is given: use column 1, otherwise start at the cursor) skipstart do not look for a match at the start position A property matches when either "id" or "type" matches. {direction} can be "f" for forward and "b" for backward. When omitted forward search is performed. If a match is found then a Dict is returned with the entries as with prop_list(), and additionally an "lnum" entry. If no match is found then an empty Dict is returned.