question: sets the `` in '' direction filter regular expression pattern . the `` in '' direction is referred to copying headers from an external message to a camel message . if the pattern matches a header , the header will be filtered out . concode_field_sep Set<String> outFilter concode_elem_sep boolean allowNullValues concode_elem_sep Pattern inFilterPattern concode_elem_sep boolean lowerCase concode_elem_sep boolean caseInsensitive concode_elem_sep Pattern outFilterPattern concode_elem_sep Set<String> inFilter concode_field_sep Set<String> getInFilter concode_elem_sep boolean isLowerCase concode_elem_sep void setLowerCase concode_elem_sep boolean doFiltering concode_elem_sep String getOutFilterPattern concode_elem_sep void setOutFilterPattern concode_elem_sep boolean applyFilterToExternalHeaders concode_elem_sep String getInFilterPattern concode_elem_sep boolean isCaseInsensitive concode_elem_sep void setAllowNullValues concode_elem_sep void setCaseInsensitive concode_elem_sep boolean isAllowNullValues concode_elem_sep Set<String> getOutFilter concode_elem_sep void setOutFilter concode_elem_sep boolean extendedFilter concode_elem_sep void setInFilter concode_elem_sep boolean applyFilterToCamelHeaders
target: void function ( String arg0 ) { if ( arg0 == null ) { inFilterPattern = null ; } else { inFilterPattern = Pattern . compile ( arg0 ) ; } }